Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ea241876b83dee…

MALICIOUS

PDF

90.3 KB Created: 2021-02-23 20:59:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 76d7313567ce15a0ce54bde56003fa7d SHA-1: 4ad7df56f52ae26bfe7eadaff009972a4e66933f SHA-256: 48ea241876b83deeb67d10fd20585728eae36d1afc2ec71af33d871834111e65
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous embedded URLs, with one prominent URL pointing to a site related to 'badger 5 disposal removal', suggesting a lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it is designed to redirect users to potentially malicious external content.

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://jacksth.ru/123?utm_term=badger+5+disposal+removal PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449789/normal_601a0448e6904.pdfIn PDF document text
    • http://xviiivbgz.com/13047816972kpjlm.pdfIn PDF document text
    • https://cdn.sqhk.co/demejapad/5hbic8K/basketball_world_cup_2006_usa_team.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/7m9hbic/20073971766.pdfIn PDF document text
    • https://lusenivusimutom.weebly.com/uploads/1/3/4/8/134887898/7849980.pdfIn PDF document text
    • http://xapakemulu.22web.org/76803426286.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466376/normal_60141f88810b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454967/normal_5ff03f75e188b.pdfIn PDF document text
    • https://cdn.sqhk.co/manaruparil/k8fAnji/56438462628.pdfIn PDF document text
    • https://jawoxufogor.weebly.com/uploads/1/3/6/0/136022219/waxazanipijigudux.pdfIn PDF document text
    • http://grusha.space/minowopagexasuxogakudunut1xd9n.pdfIn PDF document text
    • http://zolomakowifop.iblogger.org/orbit_sprinkler_timer_instructions.pdfIn PDF document text
    • https://vebodejivab.weebly.com/uploads/1/3/2/3/132302978/8bd327fa0.pdfIn PDF document text
    • http://wssummer.space/nuwobakubifor7b6l8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zifawikixeliba.epizy.com/fizixukaluluxufomi.pdfIn PDF document text
    • http://guxozuzemonixe.epizy.com/cervical_spine_rehabilitation_exercises.pdfIn PDF document text
    • http://nebiviteg.rf.gd/modote.pdfIn PDF document text
    • http://tesoxukezeziles.epizy.com/mozosevuxi.pdfIn PDF document text
    • http://vipowiso.epizy.com/can_i_use_my_phone_as_a_remote_for_roku.pdfIn PDF document text
    • http://nifukugobu.rf.gd/6508243223.pdfIn PDF document text
    • http://vulewibof.epizy.com/34074478430.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012d7a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12D7A 25024 bytes
SHA-256: 08352bc14708b7dcdc9a2c17ff39e19e9a236e1172c4fe07a1b8a4f5f9a8b424
font_00_sfnt_off0000f65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65D 5512 bytes
SHA-256: 23b31c09f0990baa90ebb9e956592bcc6b1f3770a1bc72f273ea22c498074bcb
font_01_sfnt_off0001090e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090E 10624 bytes
SHA-256: b914d0269630aa810cb5af22f9d92d61573f3d35d7c3d2c15a31456ed18dc4e3

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