Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdeecd0c01a41942…

MALICIOUS

PDF

88.6 KB Created: 2021-03-06 06:11:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 19f19877e09331f9bbb950a3a6ff18fb SHA-1: cd496c678bdcb7d1e07f5f6c1b0e6194f8707580 SHA-256: fdeecd0c01a41942b1cb4a120bf941642df68409de23a88284e1e22951c3e32f
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains a large number of external links, including to `ponafet.ru` and `cdn.sqhk.co`, suggesting a phishing or SEO manipulation scheme. The ClamAV detection as `Pdf.Phishing.Trojan` further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/award?keyword=how+to+be+a+good+speaker+ppt PDF link annotation
    • https://cdn.sqhk.co/ruvonusebex/D77ghd6/adidas_sweatpants_outfit_ideas.pdfIn PDF document text
    • http://qlemelest.online/pututilijinuluziroliziruljaet.pdfIn PDF document text
    • http://axecheat6.xyz/accidente_riesgo_biologico2e0vg.pdfIn PDF document text
    • http://ttop-shop.com/60021604505atnap.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/haXZshh/why_do_cats_walk_with_tail_up.pdfIn PDF document text
    • http://gezinuloxi.22web.org/23_cnidarian_diversity_polyps_worksheet_answers.pdfIn PDF document text
    • http://gijipodotetojo.22web.org/32538708037.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/jujojomojemiz/bokasalogivemigitikezum.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/how_many_calories_in_an_arbys_beef_and_cheddar_sandwich.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/6340110227.pdfIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_7a6c9142ce654a2a9b513df70f1730ab.pdf?index=trueIn PDF document text
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_ee87cae9678b4de18fe10da2951fceba.pdf?index=trueIn PDF document text
    • http://vulitogegitutop.rf.gd/34439203245.pdfIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_172b23a1b8804928993a7fd06262c219.pdf?index=trueIn PDF document text
    • https://983c8978-ad56-435f-a988-47358aa6040c.filesusr.com/ugd/06a663_62fac768c4494da3bd6447dde0b65b0b.pdf?index=trueIn PDF document text
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_c894b988b2d748fdb9b601542abbaa95.pdf?index=trueIn PDF document text
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_fbd6d5ae55b54329abc7d4ec7fe35910.pdf?index=trueIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_47eb0d76d7ee4d1c9043892ab73d2f52.pdf?index=trueIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_d039d34329e342b9b8c6eac2256accc2.pdf?index=trueIn 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_off00011df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF6 5352 bytes
SHA-256: 837f1b403949b9e2e45c29531909994852f0ad9d9dc564e13345822d39b6cbcc
font_01_sfnt_off00013047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13047 10808 bytes
SHA-256: 67823cb1cc0b8eb3b9c7fff59d61fc08b3e09dfdc783a996f6bdbb3a30075ae9