Malicious PDF — malware analysis report

Static analysis result for SHA-256 35811976b7e4c71c…

MALICIOUS

PDF

81.8 KB Created: 2021-01-28 13:03:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 3896725a1b6ca1aabf645f09067e65e3 SHA-1: aa46600fda38b1e93b7766b87f460da7a9a2f6ee SHA-256: 35811976b7e4c71c30280604b810d774749fb8f0ddb7d14b2ff14ba368c6883d
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, 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 phishing operation. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=continual+flame+pathfinder+2e PDF link annotation
    • https://cdn.sqhk.co/feketukadoz/hdhhyd2/horizon_t303_treadmill_australia.pdfIn PDF document text
    • https://remanajuzox.weebly.com/uploads/1/3/1/4/131437778/bugif_goruwega_jupepelilol_temade.pdfIn PDF document text
    • https://zanokelalugabu.weebly.com/uploads/1/3/5/3/135315143/kesumilotofuja.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/hjJrhga/cowboy_caviar_paula_deen.pdfIn PDF document text
    • https://dipabuxirakilat.weebly.com/uploads/1/3/1/0/131071076/nepivegaw.pdfIn PDF document text
    • http://lufusozajufa.22web.org/personality_adjectives_advanced_exercises.pdfIn PDF document text
    • https://pizeposinejuxow.weebly.com/uploads/1/3/2/6/132695365/loxodejonejuz.pdfIn PDF document text
    • https://vaturelola.weebly.com/uploads/1/3/4/7/134704713/a7f638b35bbd960.pdfIn PDF document text
    • https://zopixidasopotid.weebly.com/uploads/1/3/1/3/131397955/burivigadoterifoju.pdfIn PDF document text
    • https://fujuzelos.weebly.com/uploads/1/3/1/3/131380065/duliwepaxigoliz.pdfIn PDF document text
    • https://winozijatefazo.weebly.com/uploads/1/3/5/3/135327399/3785653.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/ipsT7Cj/58503162726.pdfIn PDF document text
    • https://bulejoge.weebly.com/uploads/1/3/0/7/130775594/8822506.pdfIn PDF document text
    • https://cdn.sqhk.co/felinavaw/Usjbiax/free_read_along_books_for_1st_graders.pdfIn PDF document text
    • http://nizuloxodiza.iblogger.org/99011155415.pdfIn PDF document text
    • https://nuzojumikosa.weebly.com/uploads/1/3/0/8/130814298/ledenixozefonam-muritedafe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wevevaviz.epizy.com/nursery_songs_app.pdfIn PDF document text
    • http://zerekigukazaja.epizy.com/loose_cannon_doctor_who.pdfIn PDF document text
    • http://wekapalipewux.epizy.com/fiziziganuvokiluwunat.pdfIn PDF document text
    • http://tenasupufowok.epizy.com/gekuwobefosemoxivopet.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_off0001041f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041F 5140 bytes
SHA-256: 855858f49fcc6325a1d1bc9e2d46d6a72be501b4c333d0adec8c5808ea3ced4b
font_01_sfnt_off0001156e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156E 10728 bytes
SHA-256: cff90c33aa7cc5ce7226eed1fdf8d085a53293b9423dcec4b7055a956568988f

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