Malicious PDF — malware analysis report

Static analysis result for SHA-256 faba3b462effbccd…

MALICIOUS

PDF

87.1 KB Created: 2021-02-28 13:00:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 829d7c95cf780205a29a9114668008cd SHA-1: 70dac78358d82905316013edac9751121cf9df8a SHA-256: faba3b462effbccd25a1707f28ceec67f501a1474b9c63194723a93f8717b5e5
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting, indicating a link farm or phishing attempt. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a URL leading to known malicious infrastructure. While no scripts were directly extracted, the nature of the embedded links suggests an attempt to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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.
  • 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://yafferge.ru/award?keyword=how+to+stop+delay+on+zoom In PDF document text
    • https://cdn.sqhk.co/numokafas/PvIgfij/ghost_riders_in_the_sky_lyrics_the_outlaws.pdfIn PDF document text
    • http://therarbooks.com/fakewitikikekidnfg.pdfIn PDF document text
    • http://fumatiw.mypressonline.com/riichi_mahjong_strategy.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzufoxo/ghLEiev/repost_stories_for_instagram_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/womilepeba/dwafTI2/dual_survival_matt_graham_net_worth.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/Eia7u7G/25339924518.pdfIn PDF document text
    • https://mazanotofubemiz.weebly.com/uploads/1/3/2/6/132681192/1209114.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/ihfgijg/sago_mini_zoo_apk.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/my_ge_adora_refrigerator_is_not_making_ice.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubokave/aihjqad/cach_hack_game_fashion_city_2.pdfIn PDF document text
    • https://cdn.sqhk.co/ropimipaf/Khijehg/49544713569.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/la_divina_comedia_quien_fue_el_autor.pdfIn PDF document text
    • https://tapizijivuvol.weebly.com/uploads/1/3/2/6/132696465/a0723a95e3ae6a.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/sowirutelevolur/7_college_masters_admit_card.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE961 4956 bytes
SHA-256: 6dfbf206acfd04fb6e6532e86b034f1a036d273b4471838d968266a699e951f6
font_01_sfnt_off0000fa40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA40 15480 bytes
SHA-256: 1f2e40695305b976553f655249660104483a6339ee9ee1f3533664f9f5d505e0
font_02_sfnt_off00012b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6B 16316 bytes
SHA-256: bffb1a1f3a6d0b61156f2d340f5ce00831c1e6b46cf0e5a0edccbb6de7acfec3
font_03_sfnt_off00014124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14124 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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