Malicious PDF — malware analysis report

Static analysis result for SHA-256 98f77978f984a220…

MALICIOUS

PDF

90.5 KB Created: 2021-03-19 09:47:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c47dd2f4095bc16c25805b47d705a47f SHA-1: 73ec8f860e0388b9e54f47c65aee0c3735161bde SHA-256: 98f77978f984a2208b018d5f317aa13a3b1b20ffc343e3e309c6d45eda50df80
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or known malicious redirectors, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded links are the primary mechanism for the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/award?keyword=property+sale+agreement+template+pdf In PDF document text
    • https://cdn.sqhk.co/wafifovuwel/iadgejf/magical_alchemy_set.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/idmNahg/62196488790.pdfIn PDF document text
    • http://airbin.top/wogodubaigyso.pdfIn PDF document text
    • http://lighttravel-ng.com/weight_training_for_cyclists7y63t.pdfIn PDF document text
    • https://cdn.sqhk.co/xenaporo/F1Ajdjd/jepevabe.pdfIn PDF document text
    • https://lufetanajimub.weebly.com/uploads/1/3/4/5/134592974/dubekiwemewenet.pdfIn PDF document text
    • https://peguwuxawotenu.weebly.com/uploads/1/3/4/5/134582441/ea4d9acd.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/iaxichf/american_truck_simulator_2020_xbox_one.pdfIn PDF document text
    • http://film123watch.com/27781185182p6tui.pdfIn PDF document text
    • http://coins24h.com/365843483757tm4v.pdfIn PDF document text
    • http://beremoter.online/predator_8750_generator_oil_capacityt8mal.pdfIn PDF document text
    • https://cdn.sqhk.co/xanodujijefu/ggee7ie/thermal_level_human_fall_flat_walkthrough.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_2e76a90f22a04891b11783f3e923cd37.pdf?index=trueIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_cd0cf414a50d4d7592250aa3e8f1df93.pdf?index=trueIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_39b8d4b521a34461b43002bded5e5f41.pdf?index=trueIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_65d04e3435ee4306aceb46f6942ffc95.pdf?index=trueIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_c530cf198510481f8776054951cd97f3.pdf?index=trueIn PDF document text
    • https://ce322291-b3da-4cc2-ae0f-523e25daec44.filesusr.com/ugd/4530da_15969ea3356742d7ba29b11dc7efa0a5.pdf?index=trueIn PDF document text
    • https://c039f79f-855f-4b64-8838-30138aeea086.filesusr.com/ugd/6b78cb_ca643bf88b80487eb14e88a8151b8e4b.pdf?index=trueIn PDF document text
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_0b22f8c17290459b80f1d7a815bc0ccf.pdf?index=trueIn PDF document text
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_dafd4446ba0f479db69ebd24955374c1.pdf?index=trueIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_d2f240a0fc794717b3907cbc7914a53e.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_off000123a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A3 5464 bytes
SHA-256: 92bdf90254a99c74d445a1240730f9dd485a9c27bbec93d668e356653db1af18
font_01_sfnt_off0001362c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1362C 11232 bytes
SHA-256: a6ca1f6bbd9f4b8490b3d35d2367e850ba334773c088237f96df8d344f817f2b

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