Malicious PDF — malware analysis report

Static analysis result for SHA-256 901d6b04acfa5281…

MALICIOUS

PDF

78.5 KB Created: 2021-01-08 09:47:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 12acd7734b8835be47e7d519172f7cbc SHA-1: 10f552c6f4e2302909eb6d56d02f8986b6d1ce52 SHA-256: 901d6b04acfa528194347f33fae174d535b232df2c0da63372fa0236d3331a2f
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically a URL disguised as a game hack download. The document body, though heavily corrupted, contains text related to 'Pixel gun 3d hack download ios 2020', reinforcing the lure. The presence of numerous embedded links, many pointing to PDF files on various hosting services, suggests a link farm or phishing campaign designed to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=pixel+gun+3d+hack+download+ios+2020 In PDF document text
    • https://nakefofomiruni.weebly.com/uploads/1/3/4/4/134483242/a0191a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481164/normal_5fedc6b4809e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450415/normal_5fd32d0eb24a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_5fd0f4220ac89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403283/normal_5fcf29795d259.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460060/normal_5fd21ac690df4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475719/normal_5fef85322e357.pdfIn PDF document text
    • https://juzuxadubibipa.weebly.com/uploads/1/3/4/6/134685448/bf22d274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471969/normal_5fe722127db05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406463/normal_5f9fd656e9b08.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
    • https://s3.amazonaws.com/zarusegibitumet/futojupokosagopumotijuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/votileduvatulinaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/wunagadodokexelime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5535563-f922-4420-aafa-fecb57b6922d/binofavabokuginapela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e948a2-c7ec-49fd-bec4-9a01f91b7eae/hyundai_tiburon_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/chunar_song_djmaza.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE518 5568 bytes
SHA-256: 18244d6de321d96bc5a565bd5f7a3d4f216d1173d670cecef5a90b37000af934
font_01_sfnt_off0000f807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF807 11488 bytes
SHA-256: 742ad6cdbc39f84b69db405b74db3d2e0108adaad836aa1483cff22b2a05dba2
font_02_sfnt_off00011f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F18 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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