Malicious PDF — malware analysis report

Static analysis result for SHA-256 75acdd8706dfb3e0…

MALICIOUS

PDF

75.3 KB Created: 2021-03-07 23:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fca12a98605793dc981103b3bdaf8b3a SHA-1: 0fd72f38ac309fa142f8ca9469875556f206e8b4 SHA-256: 75acdd8706dfb3e0a40b4d8d7aca17b416d5ff696d9a5d3b68ad5ffa8c4632ff
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicative of a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ponafet.ru/wix?keyword=motorola+gallery+apk+xda PDF link annotation
    • http://study-english-04.space/20092697121bvg3a.pdfIn PDF document text
    • http://fbcopyright-center.com/kubegixejobnh.pdfIn PDF document text
    • https://sipigatijuk.weebly.com/uploads/1/3/3/9/133999294/zuvepizozakoni.pdfIn PDF document text
    • https://cdn.sqhk.co/gigemuji/ibjchg3/ted_lasso_season_2_plot.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/igivfPr/action_hero_biju_comedy_scenes_auto_driver.pdfIn PDF document text
    • http://smotrikino.fun/80410587774xx0uu.pdfIn PDF document text
    • http://badge-verification-center.com/us_navy_atlantic_fleet_ships8hinm.pdfIn PDF document text
    • http://medway24.com/uppababy_2020_vista_v2_stroller_-_stella_brushed_grey_melangehemc9.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/zNijrji/cut_off_the_head_of_medusa.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/LNMPHhi/jutelaxixibilobef.pdfIn PDF document text
    • http://axecheat9.xyz/673231340338gj5q.pdfIn PDF document text
    • http://cashfree.store/831067162520u9gg.pdfIn PDF document text
    • http://navaram.online/romeo_and_juliet_act_1_lessonsgejl2.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/jivimomarex.pdfIn PDF document text
    • https://cdn.sqhk.co/xokekekav/ijUTWii/slime-_simulator_relaxing_super_asmr_apple_watch.pdfIn PDF document text
    • https://cdn.sqhk.co/vobilurerire/icLjczz/tafapifizun.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE32 4820 bytes
SHA-256: 94c41321ac5bf32fb8eb74c48efff470a4bc1ca807618d6ba968ebbbdda3a1f4
font_01_sfnt_off0000eec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC1 10424 bytes
SHA-256: d5f5859279cb0e37bb1c9d728b9feb26ee63a55c65c4a0ad2d6549a7d78bf6e5
font_02_sfnt_off00011252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11252 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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