Malicious PDF — malware analysis report

Static analysis result for SHA-256 07dfde3e97237776…

MALICIOUS

PDF

100.5 KB Created: 2021-03-22 14:26:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2a7f2f88061115f87f1d42bad77f29f7 SHA-1: 056de88d3e89d025b9f7a5655bc52ef548ba1bed SHA-256: 07dfde3e97237776b5432a63f000808431e7196cc2cf6f8ea71939e694e50aa1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=brian+tracy+goals+worksheet PDF link annotation
    • https://cdn.sqhk.co/wodabakope/jEmH4ig/nawuxizisorixudu.pdfIn PDF document text
    • http://devovonabukuzim.66ghz.com/xigasi.pdfIn PDF document text
    • https://cdn.sqhk.co/sugigevapure/ifjepb6/bottle_rocket_festival_2019_lineup.pdfIn PDF document text
    • https://cdn.sqhk.co/kobadaxo/DTibhdJ/bowilifuginujoduzijaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417321/normal_603fe2dfdcba6.pdfIn PDF document text
    • https://cdn.sqhk.co/misumirotoj/7jhIIin/265161292.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwexosul/hhbs1ic/kijisuzuxulaf.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/vgchd0M/lozebotebisasosagel.pdfIn PDF document text
    • https://cdn.sqhk.co/fotenulutis/vtjfggV/prediction_fantasy_premier_league_gameweek_4.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/mC1F1ij/75047823815.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459777/normal_5fe34d5033af8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405899/normal_5fcb2178e3f30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450434/normal_5fcc2d49ee507.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/gyBArwp/zunexabovivuvi.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/jdjjoEV/92195823887.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/gcibWge/prison_architect_mobile_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401714/normal_601eedbe10dfb.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/3ifZ7hg/45071397725.pdfIn PDF document text
    • https://cdn.sqhk.co/fasisela/iqhihh5/60626034970.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
    • http://minuwugonobusuw.epizy.com/fesakonazepezixovox.pdfIn PDF document text
    • http://xodolipifonabo.epizy.com/international_phonetic_alphabet_vowels.pdfIn PDF document text
    • http://fopovixiwi.epizy.com/xukebetetapaji.pdfIn PDF document text
    • http://xefukogan.rf.gd/lanzarote_airport_arrivals_information.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00014acc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14ACC 23304 bytes
SHA-256: 84ded29ff15bbfedfebd8ba5578c22b82fa041412c70bf4a191cb8080763ac5c
font_00_sfnt_off0001134f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134F 5156 bytes
SHA-256: 67678191cd090b46ecb0941e3fb9e9324d5bda187b6ace231f7b2d843dbf5c94
font_01_sfnt_off000124db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DB 11096 bytes
SHA-256: 12d8f9acac8e48cc29837c492b6b4fc205911895be563b7d862e311480a619b1
font_03_sfnt_off000173d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173D1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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