Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6653a5887c48a46…

MALICIOUS

PDF

80.2 KB Created: 2021-09-09 09:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c64c193d825ba1f1af7332c7c5e9cca7 SHA-1: 9ff9730735b8f30bad277c5e796a1d473f7ff44b SHA-256: a6653a5887c48a462747f406345ef6e079033375228568e27ff197e6d6555518
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=manga+maker+android PDF link annotation
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/ea0a54904858fc73d214a3afced0b449/bajuxisenelikaxegaf.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/83119781318.pdfIn PDF document text
    • http://tomei4x4.jp/js/upload/files/75824095108.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/powamogex.pdfIn PDF document text
    • https://wasael.com/userfiles/file/tadafopa.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161344cfd5da1b---xavaf.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/71595475031.pdfIn PDF document text
    • http://rioairporttransfer.com/ckfinder/userfiles/files/90100024575.pdfIn PDF document text
    • https://normec-cm.com/ckfinder/userfiles/files/25082538761.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/26959185176.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/bawegalijesekimumuwegep.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/75713183782.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/463af0f03df6f6b4b824c5f97ae1b0ed/fumeponalokelefekobumo.pdfIn PDF document text
    • https://cmf8.ir/data/file/kidipezufozonisoz.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613248592c91b---98947043090.pdfIn PDF document text
    • http://riviera.az/userfiles/file/xofuk.pdfIn PDF document text
    • http://mijn-nederland.nl/userfiles/file/98554330177.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d31d4db75---99374049809.pdfIn PDF document text
    • http://master-vin.ru/files/file/91610172452.pdfIn PDF document text
    • http://derp74.fooden.com/UserFiles/files/18893758145.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16137eb6701477---92958868428.pdfIn PDF document text
    • http://indianmailbox.com/assets/images/userfiles/files/39406874357.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD169 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE980 10364 bytes
SHA-256: ddfa8b53a376836ab81c80b87507a40b97a07496cb6579910634a10298285d89
font_02_sfnt_off00010097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10097 19392 bytes
SHA-256: 6975f0deee46077e1f24e276a0fc132ac3849bb45a44fa89d7315269b3564660

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