Malicious PDF — malware analysis report

Static analysis result for SHA-256 39175f4b618e5b8e…

MALICIOUS

PDF

69.7 KB Created: 2021-01-21 01:34:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 65fcd80f7a85549e4037617e99f2256d SHA-1: 7fcea408e163253f7b7807ef7d350b9c12864735 SHA-256: 39175f4b618e5b8ea2407df11aac755091b7adbd7805984d3e713bc3f2e20518
156 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains a high number of external links, with one prominent URL pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though truncated and obfuscated, suggests a lure related to game downloads, aligning with common phishing tactics.

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
  • 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.
  • 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://maypoin.ru/123?utm_term=papas+games+scooperia+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383452/normal_5fdeb32b502d6.pdfIn PDF document text
    • http://molipetofokeva.22web.org/wixenafaletalak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444644/normal_5fb723eb4daea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475209/normal_5fe5a03bd88cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426085/normal_5f9bc8c9ddf75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5fa889cb93763.pdfIn PDF document text
    • https://xudufuzed.weebly.com/uploads/1/3/0/8/130815664/xasizage-xixerorixo-dugij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/forza_horizon_2_barn_locations_guide.pdfIn PDF document text
    • http://baverasoge.epizy.com/imagine_dragon_believer_ringtone_zedge.pdfIn PDF document text
    • http://zidumive.rf.gd/96140082695.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/64742803688.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/adrenaline_hormone.pdfIn PDF document text
    • http://ponuruv.rf.gd/st_bede_s_ormskirk_school_uniform.pdfIn PDF document text
    • http://xenilesaripesu.epizy.com/fudubifedig.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/occupational_safety_and_health_iti_book.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/zagogo.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/handwriting_letter_formation_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/fekolusuzikede.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD399 5288 bytes
SHA-256: f9fdeb8e69bd422c277acbadaf0fb8d59eb2da7890679a297fef99bea1f15646
font_01_sfnt_off0000e581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE581 10652 bytes
SHA-256: 1cc38461ca435a5cd2953c7da4f7e179b560c6e10c45aebbdf6eac8ec2ff60ba

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