Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcecc5a452610bab…

MALICIOUS

PDF

79.4 KB Created: 2021-05-31 22:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a56603585383cec01fdaaee34a06f22 SHA-1: 9c2c15ee6285feebc3f60c9245ad575e9a033b34 SHA-256: dcecc5a452610bab874bf31a266ab78631808ebb2f407e4a19db99d4d9833f1b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to link farms hosted on services like weebly.com, indicating a phishing or SEO manipulation attempt. The primary URL suggests a lure related to 'Call of Duty Mobile' to attract clicks. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, likely to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://infrive.ru/pbw?utm_term=call+of+duty+mobile+ps4+controller+android+deutsch
    • https://cdn-cms.f-static.net/uploads/4387938/normal_604a7e40349cf.pdf
    • https://nibuzexo.weebly.com/uploads/1/3/4/7/134720699/6c2a5e7.pdf
    • https://kekofujazedelep.weebly.com/uploads/1/3/4/8/134879672/331ea944c8.pdf
    • https://patosalar.weebly.com/uploads/1/3/1/3/131384166/gerodun.pdf
    • https://xisifogobodi.weebly.com/uploads/1/3/4/7/134735845/ragirojajodagupejiko.pdf
    • https://luvabuzizav.weebly.com/uploads/1/3/5/2/135294148/bijupufaxukowakimuro.pdf
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5fe7b40c576fa.pdf
    • https://cdn-cms.f-static.net/uploads/4444884/normal_603657bbc8d68.pdf
    • https://static.s123-cdn-static.com/uploads/4499999/normal_6007fc7d58e28.pdf
    • https://retarabad.weebly.com/uploads/1/3/3/9/133997928/595be848edd27cc.pdf
    • https://static.s123-cdn-static.com/uploads/4475995/normal_5ff1bb6bb7c67.pdf
    • https://poperetaro.weebly.com/uploads/1/3/4/8/134893078/didulunuzux.pdf
    • https://josilagowuf.weebly.com/uploads/1/3/4/0/134018629/wuzagi.pdf
    • https://cdn-cms.f-static.net/uploads/4403557/normal_5fe837d3628a3.pdf
    • https://delidanazej.weebly.com/uploads/1/3/2/6/132681463/tatepur-pewonev.pdf
    • https://cdn-cms.f-static.net/uploads/4408336/normal_605f4c5d85c83.pdf
    • https://cdn-cms.f-static.net/uploads/4472506/normal_6055bc67b59f6.pdf
    • https://todijaxazifaro.weebly.com/uploads/1/3/4/3/134342800/3760188.pdf
    • https://cdn-cms.f-static.net/uploads/4487431/normal_601b5f872dcef.pdf
    • https://cdn-cms.f-static.net/uploads/4390661/normal_6056afca440a2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://nusuwoxub.pbworks.com/w/file/fetch/144415347/how_to_change_clock_display_on_apple_watch_5.pdf
    • http://dewubuk.pbworks.com/w/file/fetch/144422817/simurere.pdf
    • http://dekokos.pbworks.com/f/13610793161.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e62e.bin
06667aa61ac71a55269fc1cbbdd79d6332ba3ad305489ed4c8fd461eff27311d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE62E 5632 bytes
font_01_sfnt_off0000f932.bin
969f9a7430bc05db633aa1163378035f341bab923958029ef37b0dabeb54e4e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF932 11928 bytes
font_02_sfnt_off00012001.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12001 4324 bytes