Malicious PDF — malware analysis report

Static analysis result for SHA-256 664d9285921aeea5…

MALICIOUS

PDF

169.2 KB Created: 2021-01-26 05:26:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 452717da6f4de01db04a74b5ec8267b0 SHA-1: 084e6d852be6db6476e39e6d5ec3a03c66a1b4e9 SHA-256: 664d9285921aeea56ea9374bf6e8f1101da17367855faf26f46c4f28dcc9a869
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies the sample as a link farm on disposable hosting, suggesting a coordinated effort to redirect users to malicious content.

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://seumenha.ru/123?utm_term=barnstead+elementary+school+nurse PDF link annotation
    • https://monijakuxit.weebly.com/uploads/1/3/4/3/134362478/3e11f6.pdfIn PDF document text
    • https://jetukuzimol.weebly.com/uploads/1/3/2/6/132695660/zedizesupikim.pdfIn PDF document text
    • https://xidoferowugefu.weebly.com/uploads/1/3/4/3/134348033/9e2c2c5.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabudoxuwa/ihkgjgg/turbocharged_k5_kia_commercial.pdfIn PDF document text
    • https://bosijoputa.weebly.com/uploads/1/3/4/3/134317673/de8f850f80374.pdfIn PDF document text
    • https://vonemiwez.weebly.com/uploads/1/3/0/7/130776812/rudovosive.pdfIn PDF document text
    • https://sekikeke.weebly.com/uploads/1/3/4/7/134739811/toxegalabamawo.pdfIn PDF document text
    • https://fuwurukuzubefek.weebly.com/uploads/1/3/0/9/130969433/teromoz-tetaren-dosukat.pdfIn PDF document text
    • https://pupizotewijuguw.weebly.com/uploads/1/3/0/7/130775862/4763507.pdfIn PDF document text
    • http://talebakela.iblogger.org/dazeburen.pdfIn PDF document text
    • https://totijavefukaja.weebly.com/uploads/1/3/4/7/134705726/c7ef0d4cec.pdfIn PDF document text
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/5142058.pdfIn PDF document text
    • https://pelosewedi.weebly.com/uploads/1/3/4/7/134753512/kebokeg-vetoseve.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/vetamedisoz/double_consonant_worksheet_for_kindergarten.pdfIn PDF document text
    • http://vijijowop.epizy.com/bexej.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000260ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x260EC 5328 bytes
SHA-256: c093dd35cbaa590979f3e040ec61f67e42035bc6bf5513b9fb5daf2e5554964f
font_01_sfnt_off000272e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x272E4 10876 bytes
SHA-256: 6d1d5a7a7f7f6d0bb3ad04583e465e1b14bfdf0b0cbc1e586abc445c5df0e789

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