Malicious PDF — malware analysis report

Static analysis result for SHA-256 b744480e04fb76f6…

MALICIOUS

PDF

67.6 KB Created: 2021-03-22 13:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a770bad60e5dabb5d90cc14021e5c099 SHA-1: 0775c4eb6a13bb2ade610c911a33414285a24acc SHA-256: b744480e04fb76f6d32d049c68c8eb34e55ab59f2925a38439a7891e7fd53c59
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier also flag this PDF as malicious, likely due to its deceptive content and link farm structure. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit users by redirecting them to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7936

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 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
  • 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://baarspo.ru/aws?utm_term=hoover+windtunnel+3+high+performance+manual PDF link annotation
    • http://nupewijanetari.medianewsonline.com/what_does_new_wine_signify_in_the_bible.pdfIn PDF document text
    • http://lebojabufi.medianewsonline.com/81605088269.pdfIn PDF document text
    • http://zafenoro.scienceontheweb.net/czasy_teraniejsze_i_przesze_angielski.pdfIn PDF document text
    • http://maritimog.medianewsonline.com/86070775899.pdfIn PDF document text
    • https://cdn.sqhk.co/fijiwomeza/5jdjdii/despacito_violin_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/romekeka/gegjcGk/riwufe.pdfIn PDF document text
    • https://cdn.sqhk.co/fezifenax/jiaggjf/86442586170.pdfIn PDF document text
    • http://kekebum.22web.org/lanebupuj.pdfIn PDF document text
    • https://cdn.sqhk.co/texivewa/bRWVdii/87709271998.pdfIn PDF document text
    • https://cdn.sqhk.co/lupekute/jiHiPji/zombie_gunship_survival_hack_android.pdfIn PDF document text
    • https://gajegebukorivip.weebly.com/uploads/1/3/4/4/134487765/7471787.pdfIn PDF document text
    • https://papukelub.weebly.com/uploads/1/3/4/6/134666119/9120778.pdfIn PDF document text
    • https://jusodizepo.weebly.com/uploads/1/3/1/0/131070216/138317.pdfIn PDF document text
    • https://dopilefuma.weebly.com/uploads/1/3/4/7/134733068/rusolapevipujor-pefot-newuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://morupazi.epizy.com/40_mcq_answer_sheet.pdfIn PDF document text
    • https://3b9c8e93-52ab-41e8-96f8-e5fc639bf6fa.filesusr.com/ugd/fe3ccd_259031b6887044c0a3056d9cc3d680d9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ecdcc6b-d495-49be-8e18-2f58911c43e0/healthy_indian_vegetarian_food_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da4c74c-c44a-40d4-b587-b0d495126e82/john_deere_48_mower_deck_parts.pdfIn PDF document text
    • https://37cc4ef3-276f-49d0-84f3-8bc08bbde6a9.filesusr.com/ugd/e4a5d4_5b10e3573b1143499074cce4ffd96c5f.pdf?index=trueIn PDF document text
    • http://rujosaru.rf.gd/28570699320.pdfIn PDF document text
    • http://wuparol.epizy.com/xovedego.pdfIn PDF document text
    • https://92fbd7ca-8480-4723-bb2c-19523f9dca15.filesusr.com/ugd/29946e_74d3eae09dd64b63aa69147ca2fc7efa.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D7 5668 bytes
SHA-256: 34e497419ebdabbe248827378bd80b99a3428ea60a31fd3f3268b9e6adfea68a

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