Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8071f481a0436e8…

MALICIOUS

PDF

84.1 KB Created: 2021-02-24 20:54:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 66a8933e42cd7937f5aae00ec2104d5a SHA-1: 24c73d49eed259f2ccf252c473c88649261ad583 SHA-256: e8071f481a0436e840137d36dc1a62a4cf9f032a7850e1c450bbd95cf53eb2da
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body and extracted URLs suggest a lure for free music downloads, which is a common tactic for phishing and malware distribution. The presence of numerous external URIs, many pointing to disposable hosting, further supports the 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://jottigo.ru/strik?utm_term=descargar+musica+gratis+mp3+para+celular+android+xd PDF link annotation
    • https://cdn.sqhk.co/lenawemijixe/5hb1Sjd/6306363793.pdfIn PDF document text
    • https://cdn.sqhk.co/bavozazav/aK4aPez/game_tribal_mania_apkpure.pdfIn PDF document text
    • http://xafevak.iblogger.org/4745950771.pdfIn PDF document text
    • https://cdn.sqhk.co/finulepaf/Nqgjhgd/rogue_legacy_xbox_one.pdfIn PDF document text
    • http://naturaitalia.space/174150430781smxu.pdfIn PDF document text
    • http://jsexj.fun/damon_and_pythias_play_scriptm6jjw.pdfIn PDF document text
    • http://fesabip.iblogger.org/vowufufufomobigagimiguriz.pdfIn PDF document text
    • http://napojenewojiro.22web.org/malamunilagumepapoviwudep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jepafuzezax.epizy.com/ginemarir.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/34135320920.pdfIn PDF document text
    • http://ropajevunowijit.epizy.com/mivusoguga.pdfIn PDF document text
    • http://petifogowiga.epizy.com/66797297061.pdfIn PDF document text
    • http://fewetero.epizy.com/household_budget_template_free.pdfIn PDF document text
    • http://jokosen.atwebpages.com/hp_laserjet_4015n_printer.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/h_m_uk_ladies_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/marriage_certificate_haryana.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/vapirikubevapo.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BC 5624 bytes
SHA-256: 684047a86e2476f5c7e5c5d330e9c067a9b22480874a882b031668b99ec3f415
font_01_sfnt_off0000f4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C7 2216 bytes
SHA-256: c3516911a7b31728e6a09acd0b89bb2503c10e4e640faa685fa357e20998942e
font_02_sfnt_off0000fed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED7 11324 bytes
SHA-256: c950cb619d2247cd12734f64edbad0f0903c4ffc14571b37f8c640788b6a11d4
font_03_sfnt_off00012575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12575 16208 bytes
SHA-256: 22aa36257b17739ce67a696219f20d2d95308e49834d3a585d43a79591ee364a
font_04_sfnt_off00013aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA5 1736 bytes
SHA-256: 1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19

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