Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5339d520b18e8cc…

MALICIOUS

PDF

78.2 KB Created: 2021-04-11 17:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1a331132e6064e2a75d638fddfc4dcb3 SHA-1: ddacdfef718344d8736686f4e7daa8e271fe6684 SHA-256: a5339d520b18e8ccf2f9f570011b7a2b12dcb73bd8894da7ce0ece169c638200
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=what+garmin+units+are+compatible+with+livescope PDF link annotation
    • https://cdn.sqhk.co/lepowabog/jGfifMw/69382612194.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/ifuLifl/stick_cricket_mod_apk_hack.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453537/normal_5fede4ea1a353.pdfIn PDF document text
    • https://cdn.sqhk.co/midipumep/sNigfjb/pixelart_builder_for_minecraft_app.pdfIn PDF document text
    • https://cdn.sqhk.co/zupivikeg/gcjchj2/vr_x_wing_racer_3d_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bepeguvovori/FKSOnic/55048753950.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/water_pollution_book.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/awesomely_simple.pdfIn PDF document text
    • http://midakurapujif.mypressonline.com/xerostomia_causas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426941/normal_60401563e000c.pdfIn PDF document text
    • https://cdn.sqhk.co/zexukobesu/hfjcQE7/xuzolatubevemulasufusi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_60503d82b48bf.pdfIn PDF document text
    • https://cdn.sqhk.co/vukixukafoga/vEjbWgg/marshmello_ft._bastille_happier_performance_video.pdfIn PDF document text
    • https://cdn.sqhk.co/lowanivari/eOiihiK/fidezozipezafirazoru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459921/normal_6049a2163ee18.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jefazaxal/english_2_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/98703124275.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/happy_wheels_apk_award.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/basic_architecture_drawing.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/architectural_drafting_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/66320564931.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 1

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE196 5532 bytes
SHA-256: 88c49adda0ecab878d9c79a7489c825476489edde1a8dbf7cacaf8665ba9c4ec
font_01_sfnt_off0000f45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45A 11580 bytes
SHA-256: f09ec70788a165d366d65402b29f647642eba67abc4b473245e23eac8213985c
font_02_sfnt_off00011b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B83 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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