Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd9e44b8c21d973…

MALICIOUS

PDF

76.0 KB Created: 2020-12-28 22:41:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a2cf7f24ba67946c9d2bd8bc7678bf14 SHA-1: 6359cff6ddeb4e53f1a13aa58ea5daa45aba2cf1 SHA-256: 2cd9e44b8c21d97306ae738e5ca81adb6907124aa82f57b248a31e8fc4440551
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying it as a malicious redirector link farm. The document body, though heavily obfuscated, contains text related to 'Happy birthday in arabic egypt', suggesting a lure. The presence of numerous links to external PDFs, some of which are hosted on potentially compromised or controlled infrastructure, indicates an attempt to direct users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/123?utm_term=happy+birthday+in+arabic+egypt In PDF document text
    • https://cdn.sqhk.co/minamojazi/4RL8Yhj/tech_deck_mega_ramp_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/bezedono/lC1ahiW/kanedukiduza.pdfIn PDF document text
    • https://cdn.sqhk.co/navififoro/jhiiehg/3267215061.pdfIn PDF document text
    • https://vuwapelenepaje.weebly.com/uploads/1/3/4/7/134705438/4825400.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/iioAEhb/easy_online_crossword_puzzles_2nd_grade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451228/normal_5fafefe93e472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408186/normal_5f96471795074.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ninazarila/reflection_and_refraction_of_light.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/best_squarespace_templates_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/definicion_de_afrontamiento.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/dirty_dancing_movie_trivia_questions_and_answers.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000f3d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF3D1 19188 bytes
SHA-256: 42fc86fbcbe99ff67cf4a493ae87bea871dbba7cc7351a3528563031dc937033
font_00_sfnt_off0000b582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB582 5008 bytes
SHA-256: ea4aa846f9cf3cad391733743563057d79516c95902c7a2ebcd40dc4c7cd5328
font_01_sfnt_off0000c66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66D 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000cefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFB 10808 bytes
SHA-256: 13c3ee18431ea9e03e43b333778fff1931ebe7f52c9c26da7ad23471973dd183
font_04_sfnt_off000112da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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