Malicious PDF — malware analysis report

Static analysis result for SHA-256 52297b1c2ff3d9db…

MALICIOUS

PDF

69.4 KB Created: 2021-08-28 15:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d25bbfc1c02401b2dd7c5283e6e7eb17 SHA-1: 80e62e366b3dbe0aac05f7b16e25b21fb9a13237 SHA-256: 52297b1c2ff3d9db9b763f162057a5a3cc55cf5126aa21a1afb114e071747c82
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised WordPress sites and disposable domains. The ML classifier and ClamAV also identified it as malicious, likely a phishing or malware distribution lure. The embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://messianic.live/wp-content/plugins/super-forms/uploads/php/files/3b13b4fbc58ece86f45a22ffed2e81fc/xarexutatem.pdf In PDF document text
    • http://sanga.asia/userData/board/file/25742324853.pdfIn PDF document text
    • http://novichiha.ru/pic/file/julesamuwufonojav.pdfIn PDF document text
    • https://gencshow.com/upload/ckfinder/files/rewowanarifedav.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/10622455209.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7cbb5149a---lisesexujipezazorav.pdfIn PDF document text
    • http://vejwun.cz/images/palemaluneka.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/bikexelanejoneze.pdfIn PDF document text
    • http://studio70.eu/userfiles/files/79787922287.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/e172c477bf64cc0b7caa8f7d0016d16d/97386918554.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/jagubujase.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/6937264116.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/2679114695.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/c953562eb5f632ee0a1995f9cf5924d0/12406217992.pdfIn PDF document text
    • https://asken.as/bilder/file/vemirakokabumopad.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/xijepesesugabuxo.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2bac90587---kikujorivuzixowosemumi.pdfIn PDF document text
    • http://skomi.ru/img/files/file/61691904038.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/2b72129d4a49e80ae8e1e865ca20e82e/tifowobufedefikokiwapasir.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ebe2ce609---rezegaboweti.pdfIn PDF document text
    • https://unitjaya.com/contents//files/273347594.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/bufapizezatafotebuzarelup.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/116ae052379acda3fb07440cbef04545/96165681629.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=can+i+eat+brown+rice+on+ketoPDF 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

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_off0000b203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB203 14520 bytes
SHA-256: 8f5b3e255efd4caa131d20aeef1b2eb7b1ef4ef118680abc1e15d348cf043136
font_01_sfnt_off0000d683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD683 10360 bytes
SHA-256: a6a978824a968c915ae7b096066e4b204ef7644a437829312b46c96e115e9972
font_02_sfnt_off0000ee28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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