Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee31afe90308ec14…

MALICIOUS

PDF

71.2 KB Created: 2021-06-28 14:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: fb9f97b32a8e8a28a6ccfe679f4ff1e5 SHA-1: fd2ccf5d8ae951295a5c066cb19d185b85f601bd SHA-256: ee31afe90308ec147b10642c4ff70143b8c8b469b9582a560b02957dbfb69614
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or scam campaign. The presence of a link farm on disposable hosting and the use of UTM parameters further support this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://catamma.ru/uplcv?utm_term=notion+meaning+in+tamil PDF link annotation
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/bf8g3lmiaq47lc6pcak3pfcegg/kufilolekur.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aabc6aabc5c---tanisakubitugib.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b0abb0b3c---juvolijekogepufizil.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/2f18e5ccef61eebab626fb63c6409e94/37723872806.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/3026216583.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a99016344---70557916180.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1774beadbf---xoserubigomosupeno.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/6ba084ebe7799c62deda9d6a18b87bd3/87437987759.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/tedogep.pdfIn PDF document text
    • https://hgb.se/filer/file/maduwoporewuwibum.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d13f6b7db8---7253939368.pdfIn PDF document text
    • http://woorymart.com/userData/board/file/35306602438.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021062510501373499.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609838940b953---wivitutatefuduwuvegatu.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160980030da100---labave.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/godov.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/48e412b12698c09b2028a32e8db11df4/basagiv.pdfIn PDF document text
    • http://charivne.info/images/file/95069586368.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/wufikelijejofebujajagavav.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/0ie0lb25jjo2notbfphnn29km7/vesabavokoladaziva.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/babawukivixo.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_off0000b80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB80B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD022 10160 bytes
SHA-256: 62e44d5a2f96cb12a5f119cc342ac5b334cf8c846f8dd6095ea14922baa1e487
font_02_sfnt_off0000e6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CE 15988 bytes
SHA-256: 2d7590a04e2667b890c312cd1364a5c77c27f4a44480aadcb4f165e368e34020

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