Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d85c0745d72191d…

MALICIOUS

PDF

78.6 KB Created: 2021-03-04 00:56:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: ee20503ed0f8fd5d86fa801c684f1998 SHA-1: 1424332084d8d9ff517df625b444664e749c94fe SHA-256: 1d85c0745d72191de9bb4387de4fcfb9f1eb01d3f9eaeb0e3b2a51233539ecdf
186 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains a large number of external links pointing to disposable domains, indicating a link farm or SEO spamming operation. One of the primary links is to 'http://zipubezexupoka.mywebcommunity.org/bavubefaro.pdf', which is part of a mass external PDF link farm. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf.

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://lozipotod.ru/award?keyword=james+and+the+giant+peach+miss+spider+wiki PDF link annotation
    • http://zipubezexupoka.mywebcommunity.org/bavubefaro.pdfIn PDF document text
    • http://retamos.mygamesonline.org/88703076329.pdfIn PDF document text
    • http://bbcua.site/murray_lawn_mowers_for_saleta7cv.pdfIn PDF document text
    • https://mimoleratamofip.weebly.com/uploads/1/3/4/5/134500060/1553603.pdfIn PDF document text
    • https://ralarisum.weebly.com/uploads/1/3/4/0/134040561/7824569.pdfIn PDF document text
    • https://penaxixix.weebly.com/uploads/1/3/0/8/130813526/getaxugerepina-xagakaxika.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/gasezenawuvopazemanajodeybohm.pdfIn PDF document text
    • http://pubgmobiie.com/sunrace_12_speed_xd_cassette_reviewb8192.pdfIn PDF document text
    • http://avtovishki-msk.ru/vigunurr4vr1.pdfIn PDF document text
    • https://tamidotojo.weebly.com/uploads/1/3/1/8/131858916/dipusodon-witulobonutap.pdfIn PDF document text
    • https://xufalawat.weebly.com/uploads/1/3/0/8/130814535/7636149.pdfIn PDF document text
    • https://dosabaret.weebly.com/uploads/1/3/4/8/134861273/5290398.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/24391410124.pdfIn PDF document text
    • http://defi-bet.world/23840728558iurwy.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/to_train_up_a_child_michael_pearl.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/widetunipet/95150955996.pdfIn PDF document text
    • http://kosirokuki.epizy.com/himalayan_jumping_spider_habitat.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_off0000f6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E7 5600 bytes
SHA-256: 4adcaa0bedceb5d44148e2949a03781fc80fe0459bf117a782971d57dbdc4f0d
font_01_sfnt_off000109da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DA 10440 bytes
SHA-256: a82b8e7c51c27b76dbec1ddc3be9fcf83125b0b77dfc76b9e94c69103e13000e

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