Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e93486fb59af8db…

MALICIOUS

PDF

93.9 KB Created: 2021-03-03 23:13:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 27e0ae0d64b022d1c4a889f13d497cb9 SHA-1: 3fd52e24c671c65d637f1e56ce122e24b18689d4 SHA-256: 8e93486fb59af8dbd7f119058346ec8b19e5c9603daf6ed8b57712463ff8d0bf
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs point to potentially malicious or spam content, and the document body, though heavily obfuscated, contains references to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://midufefew.ru/wix?keyword=how+to+take+igf-1+lr3 PDF link annotation
    • https://gulikefesagigal.weebly.com/uploads/1/3/5/3/135303577/zibum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389823/normal_5fce62bf33593.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405641/normal_601b97ef1f819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391893/normal_602d72d32cd57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370284/normal_5fd1c6c2eb8c6.pdfIn PDF document text
    • https://cdn.sqhk.co/ninulekuto/g0Pfdhi/whatsapp_notification_sound_iphone_not_working.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372980/normal_5fcbb8c62e63d.pdfIn PDF document text
    • http://pubavamamuzagur.iblogger.org/rofesivawusaleji.pdfIn PDF document text
    • https://latowinu.weebly.com/uploads/1/3/4/5/134508675/vifivexikeguvaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/dexizajifu/jOiggga/pulse_rate_normal.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/ZhhP6hg/lucky_skyblock_mod_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407793/normal_600a95f6c035a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_60164bf36132b.pdfIn PDF document text
    • https://birupilanakok.weebly.com/uploads/1/3/4/0/134017156/83c037e6a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473047/normal_5ff46fbacc548.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/jiwisi/toniwozozamo.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/gasipabiwewopo.pdfIn PDF document text
    • http://jezesukawug.rf.gd/ardaas_karan_full_punjabi_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/vevepugapulozedigu.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_off00012741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12741 4804 bytes
SHA-256: d2dd6466275a3aa0a71839e3f193cd427bbbd98cb5d811e269eb55fd4671ef39
font_01_sfnt_off000137d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D2 10648 bytes
SHA-256: 1e6259ee30e8c206536cc6e01839a3953d26dd7262923545fe9a411ef54e2095
font_02_sfnt_off00015c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C58 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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