Malicious PDF — malware analysis report

Static analysis result for SHA-256 22cbf62132579c94…

MALICIOUS

PDF

87.1 KB Created: 2021-04-03 00:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 80fe80b7f31dde5893281d7a54c8f38c SHA-1: 7d355144526b10333ef03901c7809b7523fb8283 SHA-256: 22cbf62132579c9408ca393ba7842cb7e7c9fbfd2cd901dcbef7a8ef6dcfcac4
244 Risk Score

Malware Insights

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

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 embedded URLs, many of which point to disposable hosting and appear to be part of a link farm, with one URL specifically identified as a known malicious redirector. The document body is heavily obfuscated and contains what appears to be metadata related to PDF generation, but no clear instructions or lures are discernible.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=negative+binomial+regression+interpretation+spss In PDF document text
    • https://cdn.sqhk.co/dopiporajen/gCycgem/sowepelewa.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/20988001097.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/Sgcwghd/plane_with_2_helicopter_rotors.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/hdij1ja/ivry_hall_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/jhgich3/hubby_birthday_memes.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/77765204697z5f96.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/googlemaps_android_app_tutorial.pdfIn PDF document text
    • http://silkhfig.bid/2615477242401cmu.pdfIn PDF document text
    • http://shoplus.info/hampton_bay_replacement_remote_uc7083twcr4p.pdfIn PDF document text
    • http://blablablacar.online/skyrim_failed_to_start_error_code_809l78h.pdfIn PDF document text
    • http://select-get.top/flower_garden_layout_planner_freeovkmk.pdfIn PDF document text
    • http://marafonsport.site/44706186910ndqrp.pdfIn PDF document text
    • http://aires.fun/how_much_is_ddp_yoga_on_demandplyob.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/75369661848.pdfIn PDF document text
    • http://idem-peshkom.ru/html_to_api_githubzxwll.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_a9c8214f9d0c4f1b9230293cec86405e.pdf?index=trueIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_dc97808d9e6f43ef9eacc012047b7d89.pdf?index=trueIn PDF document text
    • https://5613ab86-cfe5-4642-b9e1-29ab5e510d76.filesusr.com/ugd/79e000_fd813eb280a14fb9971ed8ce551474d2.pdf?index=trueIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_0f6b2baf96424fbd982faa670c4a4687.pdf?index=trueIn PDF document text
    • https://316b94d8-f1eb-4552-9621-e6dada6029ed.filesusr.com/ugd/4b675a_49866ef6137a4a82b848db6172cd7601.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

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_off000115f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F5 5308 bytes
SHA-256: 8be4cb623cfead3d897838898b740706384d181573ae96eaee6f8634fcae826b
font_01_sfnt_off000127fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FB 11400 bytes
SHA-256: 5dabff6410417a4474af4c7d7491b5cd310de13c8b325390015d271207965b12

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