Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab4dc2a3f255697…

MALICIOUS

PDF

73.3 KB Created: 2021-03-22 02:13:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 37d1fb1252d55101fa6e4d25c6b68591 SHA-1: 32cf245bf3b11a107f61a16dd3ee7564e485d9c7 SHA-256: dab4dc2a3f2556974c098e40028bb8e1b977bc690c38d0c38dc5e117871e3a1d
156 Risk Score

Malware Insights

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

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 0.9991

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
  • 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.
  • 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/wix?keyword=dnai+gel+electrophoresis+worksheet+answers PDF link annotation
    • https://gufurokis.weebly.com/uploads/1/3/1/4/131453316/kizan_puzitomefo.pdfIn PDF document text
    • http://ledy66.net/wererat_boss_5eedg3p.pdfIn PDF document text
    • http://ighelpcenter.xyz/66277303485iw55h.pdfIn PDF document text
    • https://cdn.sqhk.co/najafizox/TgMdidv/dinosaur_zoo_collect_build_codes_2019.pdfIn PDF document text
    • http://wobokegidutijem.iblogger.org/what_two_countries_border_north_korea.pdfIn PDF document text
    • http://rijogemas.iblogger.org/best_non_canon_star_wars_books.pdfIn PDF document text
    • https://cdn.sqhk.co/kusedesomawa/hhgmhag/91519203518.pdfIn PDF document text
    • https://cdn.sqhk.co/wifukatar/8TgeEf9/kalidorakupupomoliwuxa.pdfIn PDF document text
    • https://cdn.sqhk.co/balekunu/wjagcjd/gowuxizitu.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/jufolakefogel-zizisiriro-gowobopupowomi-xuzepakexe.pdfIn PDF document text
    • https://filinisosiwox.weebly.com/uploads/1/3/0/8/130814007/vuroxejozoxuni-lovux-jogazuz-wevepusefifebe.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/gOiiAhh/ultimate_car_driving_simulator_game_download.pdfIn PDF document text
    • http://policyhelpcenter.com/why_does_alicia_see_mice_what_is_her_fathers_solution_to_the_problemsiwpx.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/zegatanemodifi_sumobabejik.pdfIn PDF document text
    • http://wimawukit.iblogger.org/bafuludasogunofej.pdfIn PDF document text
    • http://deflecfcvy.best/birdy_grey_dresses_dusty_blue0gwce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/proving_triangles_congruent_using_sss_sas_asa_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/aggiornamento_sistema_android_timvision.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/picsart_mod_apk_onhax.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/70740742206.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/sijuwivezuju.pdfIn PDF document text
    • http://mezajuwobit.rf.gd/58420359963.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/tefizogufivet.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/aida64_completo_gratis.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 5352 bytes
SHA-256: 2277cf0ac0f1936f7468e5c1bcce5c9531443ee92f28ede70c5fad151fcdcf27
font_01_sfnt_off0000f4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BF 10152 bytes
SHA-256: 33e8595bc106f4070c4ddb17867736f478ac09b0d9e4d491e62aad7ff2f17c28

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