Malicious PDF — malware analysis report

Static analysis result for SHA-256 138d42d200043506…

MALICIOUS

PDF

74.0 KB Created: 2021-03-22 20:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 565c5a83fa182d5862a505b8d2198141 SHA-1: b57711602ee744b4515e9fa90cf18433721c30ce SHA-256: 138d42d2000435063737c06bdf9abd7d274537d7335e00cbeb30e8cc3b4f4306
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though partially corrupted, suggests a lure related to DMV appointments, directing users to a suspicious domain. The presence of numerous external URIs and a link farm heuristic further supports the phishing and malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://dafemum.ru/strik?utm_term=how+can+i+make+an+appointment+at+the+dmv PDF link annotation
    • http://ig-mediateam.net/sports_illustrated_cover_2020_56_years_oldmsot9.pdfIn PDF document text
    • http://www19216801.site/esv_bible_translation_reviews355ga.pdfIn PDF document text
    • http://7evenrp.ru/asus_tm-ac1900_firmware_flashllyfd.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/exercicios_com_was_e_were0hs0i.pdfIn PDF document text
    • http://golden-charm.ru/2021_toyota_camry_trd_v6_awdm66ig.pdfIn PDF document text
    • http://wgathering.org/how_do_i_set_the_time_on_my_casio_watchg2rsg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366020/normal_5fc811092665e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493266/normal_5ffcacb53f664.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447095/normal_604e767b4fd27.pdfIn PDF document text
    • http://bigchance.pw/thrustmaster_hotas_x_star_wars_squadronsetfc1.pdfIn PDF document text
    • http://bajigesupin.iblogger.org/98960570693.pdfIn PDF document text
    • http://mmmuuuue.space/48708185711yj1eg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417312/normal_5fd9bd04aae39.pdfIn PDF document text
    • http://lyudi23.ru/college_and_career_readiness_standards_californiaggdie.pdfIn PDF document text
    • http://cosmosqrab.online/juwawaderamuvogetukasasa8kqw1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384026/normal_5fed95e133a32.pdfIn PDF document text
    • http://nomuvafemokin.iblogger.org/49875930440.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/dovulavavo/kebomevojarazexu.pdfIn PDF document text
    • http://junenizexi.epizy.com/rowiradugirupejolinarigak.pdfIn PDF document text
    • http://zepogofeto.epizy.com/certificate_of_conformity_of_quality_management_system.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/dapunajobalamazamadewaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/xufinamidamegig.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_off0000e466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE466 5184 bytes
SHA-256: c31b3ce4985cf73c0b604e8910d6aa4a179a21704913ea8027b0a5bf1362204a
font_01_sfnt_off0000f5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FD 10784 bytes
SHA-256: 4c2033a635e7349ce4d741093126b59930a3678f06453cf5e83b8325c64b870a

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