Malicious PDF — malware analysis report

Static analysis result for SHA-256 acccf89f8d87e73e…

MALICIOUS

PDF

114.1 KB Created: 2021-04-28 08:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 9f9f43815b0f91bc3dd2cab09062de55 SHA-1: db99d0107540765ac972727a3138b7b937a44185 SHA-256: acccf89f8d87e73ef4e193c4978861e512c281627d6b8b09acce14badc1aff6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations. The document body, though heavily obfuscated, suggests a lure related to a 'Yodobashi camera umeda floor guide'. The presence of multiple compromised CMS upload links and a link farm heuristic indicates a strong likelihood of phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/3onolkvh010su91hemqcf700mo/rovavopuget.pdf In PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606eae764a357---63593346718.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606d003515f2d---sakodawiwo.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b982aa5bd---83614645975.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608199930e3e8---vorikuzitawesogisu.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/d1c90ef624434f6610959721755cc1f7/wotezuxagifotamiwumosa.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086dc5045624---nebexele.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088eaf4a658c---sejuwanegowame.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/1c7e1a7d1b63fd865ffc3edfa13cedd2/meniwikeseliwowedubazep.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/da6fd732fc5e0f82a9926a511048a439/91488994375.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/ri6kp84jc7tpk546f3h1j8q55p/dezivuvo.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608223a9cb3c0---bazabijomodofelugulupu.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/fa6cfc7a1e6912cc5b1e5159b79e5cf1/mopefumujoxifat.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16081644368fe6---72345075681.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/8d1e27ca673753ec5512932f0351b0ba/zanivirurekuni.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608027d7a05f3---laxowolabo.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a71f1ef4c---96600726037.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=yodobashi+camera+umeda+floor+guidePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000193aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x193AA 16876 bytes
SHA-256: 4c9814916ea169c6abc4ff4d43bc496d0c929caf14c08f673c294b78b51df45f
font_00_sfnt_off00011d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D85 14280 bytes
SHA-256: f2217cd91695a56b47b0d841bc787f2e14d6b64fae087c1cadfd348ed64a34bb
font_01_sfnt_off00014c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C30 5232 bytes
SHA-256: 37c5a7aa5fa14d34623bb8c3cc152d75f30f8a00f85755cd843095532a457ec8
font_02_sfnt_off00015df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DF1 5812 bytes
SHA-256: ac46ee95c0fa6e3a7d391a0d808f02bfdea0c489ddbd44b21f539b2961f851a0
font_03_sfnt_off00016c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C8A 11596 bytes
SHA-256: e4abc1edcf9783aec3cb6c15d1ba977900ebf00df763bac9a5ab443818494448
font_05_sfnt_off0001aba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABA7 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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