Malicious PDF — malware analysis report

Static analysis result for SHA-256 adfe986ed35e18fc…

MALICIOUS

PDF

77.1 KB Created: 2021-08-30 04:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9388566c11a028915a7ea604e321b56a SHA-1: 23cc0decdf064fc07b822f649d3c7d28b26094d7 SHA-256: adfe986ed35e18fce2488f02afdb297c74e206b7d8d0491a828059fa172558ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous disposable domains and compromised WordPress uploads, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs are designed to redirect users to potentially harmful content, likely to steal credentials or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cructi.ru/uplcv?utm_term=command+%26+conquer+the+ultimate+collection+torrent PDF link annotation
    • http://modellszerviz.hu/userfiles/file/37331174691.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/vifajuvivajak.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/wimewuretiwesisa.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/7f7d87161cd08c90d4ff0b5c4bb4a20f/31107155266.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/84380966985.pdfIn PDF document text
    • http://passaicvalleyclassof1957.com/clients/44362/File/20864853492.pdfIn PDF document text
    • https://sanidom.pl/img/file/70706448656.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/73224406006.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d23e4ab2885---71754748916.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160da6683bfefa---35234037692.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/2a3d794d6a4482c17c2e9e0088b27636/rovegenala.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16096b21e6ba30---69129580879.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/3fstnocvunvppe9u6s18k1a1t4/kopunovijomilatipu.pdfIn PDF document text
    • https://langumeistras.lt/i/File/58420040662.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/xojosiroxoroxezegikaliwa.pdfIn PDF document text
    • http://prosquash.by/data/15958306885.pdfIn PDF document text
    • http://betonkeritesek.eu/Content/files/91761593832.pdfIn PDF document text
    • http://heizler.hu/files/file/xepesiwin.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609def87a887b---lanotibesifiziv.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/71158911086.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/wazugedolijozimusomujinud.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/86256535931.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/togus.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE92 9796 bytes
SHA-256: 33d8bcd01647c1f2f755d90548d669f30afe44a395f50acce3af5bcfe9d52abe
font_01_sfnt_off0000e3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EC 16352 bytes
SHA-256: d076bf114d838b226df4546016ef905cba4b13efa191a59142d9309347ea7667
font_02_sfnt_off00010dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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