Malicious PDF — malware analysis report

Static analysis result for SHA-256 394d839c7aea32de…

MALICIOUS

PDF

97.2 KB Created: 2021-03-24 13:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 062104bdfe4676ecff26faefde82170c SHA-1: a3d50501c81dd3c3e022e92d351ce97542dd76ea SHA-256: 394d839c7aea32de4c08c85ae48eb5c2140f5cdaa4b976e9b9bee0bd22ecaa4c
244 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm designed to improve search engine rankings for malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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/123?utm_term=adobe+reader+pro+for+pc+free In PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/xibebenufapubesovubiviwos.pdfIn PDF document text
    • https://dokegofixak.weebly.com/uploads/1/3/0/8/130873830/kepegudu.pdfIn PDF document text
    • http://biomaniks.website/what_courses_do_you_need_to_be_a_vet_teche940t.pdfIn PDF document text
    • https://vajinivokesele.weebly.com/uploads/1/3/5/3/135326698/dekizipojof-kuvona.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/ltplkii/jajexekewesajirinisakef.pdfIn PDF document text
    • https://zumuwezejulo.weebly.com/uploads/1/3/1/4/131455722/vadutototosesisavu.pdfIn PDF document text
    • https://bobiputab.weebly.com/uploads/1/3/2/8/132814039/4f2d565b8f5c53.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/doraemon_cartoon_song_mr_jatt.pdfIn PDF document text
    • http://lnstagramcentre.net/36433507879cklc1.pdfIn PDF document text
    • https://cdn.sqhk.co/bojidokagivi/jjgfhaw/better_camera_quality.pdfIn PDF document text
    • https://cdn.sqhk.co/tirabipati/hiidhd3/grh_la_gestion_des_ressources_humaines_en_action.pdfIn PDF document text
    • https://lofokuvowuvi.weebly.com/uploads/1/3/4/3/134362742/wokerupasazexu_wazedaxi_kexed.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/what_do_the_symbols_mean_on_mitsubishi_air_conditioner_remote.pdfIn PDF document text
    • http://milanomoda-italy.site/24849046366wacrw.pdfIn PDF document text
    • http://cabinetsly.xyz/photoshop_brushes_grunger8nfe.pdfIn PDF document text
    • https://cdn.sqhk.co/savujegu/dbieh0L/rurolo.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/33341471374.pdfIn PDF document text
    • http://timelessdecorum.com/the_house_of_the_spirits_isabel_allende_vkwhq1r.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuxezol.rf.gd/breath_of_snow_and_ashes_timeline.pdfIn PDF document text
    • http://zudejemil.epizy.com/xagovuxameju.pdfIn PDF document text
    • https://2a009ac4-5770-49f2-ae16-4ce107243443.filesusr.com/ugd/59deca_79c06babf8d54bf6b78185522059f76f.pdf?index=trueIn PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_33f5ba7265d74f8ba8ffcd8c2b46411e.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011260.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11260 13388 bytes
SHA-256: 3233822616a2c572ff79a66234151afda3055bc9163059b9121cdc399bb0cb57
font_00_sfnt_off0000ee62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE62 5336 bytes
SHA-256: 9553b852ba66d858596c52237ff0706371c74e4d8f960d5c434dd649c2606cf2
font_01_sfnt_off0001011f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011F 5068 bytes
SHA-256: ea048aac8b62cf1406cc831a251d3fabcc7ba6c42663324655ef9eac54d979a0
font_03_sfnt_off00013748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13748 11992 bytes
SHA-256: 6f480e7b681c64a65452c90eb46ea174e0ca43a1440d4e1ece4fe9b94cd19810
font_04_sfnt_off00015e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E1D 16488 bytes
SHA-256: 1d240a0535f2140f7c954fae970985d54487e451ba4ee00a2f6f8a8e98c285da

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