Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f283850df3b28d…

MALICIOUS

PDF

75.8 KB Created: 2021-05-10 10:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e3038aa6b40bb42ec04ef19c4c299864 SHA-1: 83f981223f963521fa690bf245fb4e2819c93cb8 SHA-256: c1f283850df3b28d0f796e247aeabb259b91ef3872a2fba5cc87c61f4b7f3447
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://maypoin.ru/strik?utm_term=is+chemical+engineering+a+good+career PDF link annotation
    • http://kasyanbeauty.com/does_texas_tech_offer_online_degreeszb7wv.pdfIn PDF document text
    • http://microdigitalmeter.xyz/80447822726al025.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387573/normal_5ff3b1a95867a.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/gcigCSo/covet_fashion_dress_up_game_1.pdfIn PDF document text
    • http://apsmall.space/tibisajxwaz.pdfIn PDF document text
    • http://sugakibabusu.scienceontheweb.net/desokegow.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/14505155225.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvotalek/ij8yhdz/marvel_comics_nyc.pdfIn PDF document text
    • http://creditinquiry.info/29028623992rklq0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497071/normal_605303e7132ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_6029991a7f79b.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/digital_poetics_an_open_theory_of_design_research_in_architecture.pdfIn PDF document text
    • https://cdn.sqhk.co/suxavawudomo/aUgdreu/wedding_salon_3_game_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fipijife/75468525176.pdfIn PDF document text
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_fadd64cf1a644109852814cc146dbc41.pdf?index=trueIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_a2a88e618b1c44e692c66dc016d4087e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ropuba/coffee_cup_mockup_template.pdfIn PDF document text
    • http://dolojivek.onlinewebshop.net/joretugoratuleduz.pdfIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_e5cca99e97a84a97adf80f99207cda77.pdf?index=trueIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_27b33d8a7e7445ee92555ac193ed1ff4.pdf?index=trueIn PDF document text
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_8ba0ed5389084f54b76c1185d59bf30a.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8D 5288 bytes
SHA-256: 84c3ea0a5e69510fc82eed39e2306364ad266d0931808a5d1ceacf0065c42123
font_01_sfnt_off0000fe55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE55 10544 bytes
SHA-256: 190e415053e2810c394dfdfde7291a4aa07b80069e449a2e842dc517edd68691

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