Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6e0b9cf0e7a3c4…

MALICIOUS

PDF

74.1 KB Created: 2021-02-25 13:55:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 05628f8956dbb78284416f1079eef234 SHA-1: 987906f98bef4bd4a92b5cc5d18de7eb6fa8bdcb SHA-256: 9c6e0b9cf0e7a3c43195ab30438c77406d0dd6c780ddb77be894dcdda28df1ce
66 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, likely as part of a phishing or scam campaign. The document body, though heavily obfuscated, contains text related to search queries, suggesting a lure to a fake search result page. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://baarspo.ru/wix?keyword=paint+brush+strokes+on+wall PDF link annotation
    • http://fukuzowi.sportsontheweb.net/how_gm_diet_plan.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/zadularesitefojejepok.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/38377226238.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/64605898956.pdfIn PDF document text
    • http://terugate.mypressonline.com/ge_digital_timers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450419/normal_60251ce01acef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408321/normal_6008d3fa12716.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/element_elefw504a_tv_stand.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501501/normal_5ff4c3704b13a.pdfIn PDF document text
    • https://bezijenogekise.weebly.com/uploads/1/3/4/8/134875893/limululavinas.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/37363893678.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nununad.myartsonline.com/officejet_pro_8600_ink_cartridge_replacement.pdfIn PDF document text
    • http://zuputes.atwebpages.com/acurite_rain_gauge_walmart.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/is_rosemarys_baby_based_on_a_true_story.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/71137257355.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AC 5072 bytes
SHA-256: 4eb47f3c52808dd2fabd8621800f4b347ac13d1d0ec97172d7d7a1eb323186c1
font_01_sfnt_off0000f6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F2 10760 bytes
SHA-256: 8127ca02e2fdecdddee77f00d5801509a6df74289b73b5a97b6c15487e53a89b

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