Malicious PDF — malware analysis report

Static analysis result for SHA-256 51f2d757fcd88149…

MALICIOUS

PDF

81.1 KB Created: 2021-02-26 21:42:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1520da52c0c2bca56d0cf46efaa43e9a SHA-1: 6ec553929f646eca75ced9bc332d8674e3d246cc SHA-256: 51f2d757fcd88149f3866e666cd8d3156c6fd34f53d027b4364a0d53ffb3698f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a search query, directing users to a malicious URL for further exploitation.

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://xezojetit.ru/strik?utm_term=what+size+battery+replaces+lr41 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467927/normal_5fced34e17148.pdfIn PDF document text
    • http://6gusevshop.space/vusatuwsp8.pdfIn PDF document text
    • https://kazazurijufom.weebly.com/uploads/1/3/0/8/130814205/menigupapuxize_jojubuvabud_vunuvojaruroki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465127/normal_6035060c37f70.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/PgiieEA/wijuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480585/normal_603417d54192a.pdfIn PDF document text
    • http://usacreditreport.info/legamotojuvetakajarixigyuv07.pdfIn PDF document text
    • https://zunarorukozem.weebly.com/uploads/1/3/4/0/134016655/525533dae93cf6.pdfIn PDF document text
    • https://bisenazogogo.weebly.com/uploads/1/3/4/6/134686343/zekaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496001/normal_5fee786f270f6.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/bHgjgdU/42750786907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450034/normal_600acc38d4297.pdfIn PDF document text
    • https://cdn.sqhk.co/sivefuxonix/ghhsIjb/17619903707.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/BQiikR3/75269833625.pdfIn PDF document text
    • https://cdn.sqhk.co/mupijuwo/fgfjehb/whisper_of_the_worm_quest_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_6033abc9be373.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://junedujivoxoz.epizy.com/corrugated_steel_sheets_uk.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC5 5040 bytes
SHA-256: 2d9eab3b3733dc48e03897918f5f223ca0f13b67c7a68f269355e137925f43f2
font_01_sfnt_off0000fc0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0F 2400 bytes
SHA-256: eb1471ef9b6d3bd5c44079db7cf76bccc564927beeb9260c7b6a6c8ec924baaf
font_02_sfnt_off0001058f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058F 10228 bytes
SHA-256: 4494a89f58fcc61e2123f0e3fe9fbe3673156d9bffa9826106501aaf41ff0264
font_03_sfnt_off000128aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.