Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f3958592b82413c…

MALICIOUS

PDF

75.7 KB Created: 2021-05-06 09:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: da3bcbc4ff132a62bb98f8fa9e34c811 SHA-1: d729f259444c8b4b3c33f1f385198358f7172623 SHA-256: 4f3958592b82413c0f9c0f6fbe050622c76b7402de2098aaab6b5d9b96f24930
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://jumiwimov.ru/strik?utm_term=excel+course+online+free+youtube PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444850/normal_60175c8996a95.pdfIn PDF document text
    • https://cdn.sqhk.co/zubejavaxuvu/i6hehgS/viking_gods_vs_greek_gods.pdfIn PDF document text
    • https://lovefuzabuzonif.weebly.com/uploads/1/3/4/1/134109130/82bbdb7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471083/normal_6018cdc0e33e2.pdfIn PDF document text
    • https://kumuxulunewun.weebly.com/uploads/1/3/0/7/130775174/1caab38122.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/Pps8gdW/how_to_draw_army_man_easy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444098/normal_60328077e02c3.pdfIn PDF document text
    • https://cdn.sqhk.co/nibijegun/CjfiamW/pawejuxosuwizo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366045/normal_5ff1e558b43ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_606af34a37bab.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/YhhgcGS/33497671316.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_f6260bee661b4012a7c921acaf2d9055.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/88937246-2143-4efd-8423-867c2a8e69ee/wakaniwajunuba.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/nubazuda.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/ankhiyon_ke_jharokhon_se_old_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/what_does_the_olive_leaf_symbolism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91ccf6aa-8e05-4f80-b3e5-42ae3476ad11/breville_smart_oven_pro_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d593a2fb-73ce-4f19-a6fa-9068e8e39899/honeywell_wireless_thermostat_cm927_not_working.pdfIn PDF document text
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_7d2a6c2a8c0644f184fd22bc4fe9ea3b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mogipegi/ford_mustang_mach_e_awd_review.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

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_off0000ec05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC05 4932 bytes
SHA-256: 4764559457efa3d882e97eeff87877854f8899a524635b707c78207c77b0940c
font_01_sfnt_off0000fcf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF2 10964 bytes
SHA-256: e4ab5e5a08f8bcb30c7f04f19778a611cd99a534c4bb8b4125af4489f5423f1a

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