Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d5d956a1d29904…

MALICIOUS

PDF

100.1 KB Created: 2021-03-20 00:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8519e17e1a7a007eb50a7fd953d2d235 SHA-1: 457ff7e0869f73de6982f97dcc363221c4853b61 SHA-256: c9d5d956a1d299047b1a556f03e35d8751de48e2a37ba2095c0ea36b76a56deb
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The presence of a QR code lure further supports a phishing or malicious redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=friendly+letter+format+in+malayalam PDF link annotation
    • http://sluzhba1.net/41164497879xgag.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/haNhceE/85615711340.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/jajjhjc/modern_sofa_table_lamps.pdfIn PDF document text
    • http://aromaita.space/82502942746d4sb5.pdfIn PDF document text
    • http://summer-italy.fun/ctecs_workplace_readiness_skills_test_answersr07cw.pdfIn PDF document text
    • http://ludshop.xyz/69287976358gxmip.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidimewako/dEigjou/71349825191.pdfIn PDF document text
    • http://khanapoorti.com/bekaborepalebv6ac.pdfIn PDF document text
    • http://kefets.xyz/no_easy_day_movie_castkhquw.pdfIn PDF document text
    • https://mikixobitesa.weebly.com/uploads/1/3/0/7/130776626/popamunitem-vubirezekovezij.pdfIn PDF document text
    • https://kojaresojew.weebly.com/uploads/1/3/4/3/134312518/87e6829bacc61e9.pdfIn PDF document text
    • http://tehnotop.space/cvor_test_questions_and_answers_ontarioa5mbg.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/h0gdgdO/58943128262.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/ibsifhi/snapchat_emoji_smiley_face_with_pink_cheeks.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/dukale.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/h1qoMp8/55853790108.pdfIn PDF document text
    • http://kvrovk.xyz/75879795806islfi.pdfIn PDF document text
    • https://jafekubu.weebly.com/uploads/1/3/0/8/130814731/puzodijewezoj.pdfIn PDF document text
    • http://slamelina.website/grays_anatomy_reviewgp2w8.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/ijcjfha/need_for_racing_fever_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sigagegijej/jKxXwgf/91071511745.pdfIn PDF document text
    • https://cdn.sqhk.co/fasazani/tjjhfhd/zaxajewosod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://zufonokimilije.epizy.com/sapelokiwidubi.pdfIn PDF document text
    • http://ripeterub.epizy.com/17441835037.pdfIn PDF document text
    • http://datidalumoz.rf.gd/bsc_modern_physics_notes.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CF 4932 bytes
SHA-256: 16538f0af9dd87122e19cc2d40be5419d3510211bd375287e3b604b17f6c102d
font_01_sfnt_off00013180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13180 11844 bytes
SHA-256: d14edade79350314cb8ada7e30be2abd1b2f0a892fb07cbb68a9e912530b3541
font_02_sfnt_off0001577c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1577C 12364 bytes
SHA-256: e26a95dc320ce0c046f42f59d75baf88ad7a62b472b75dc2774af847de7f59b7