Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a603238e8eb60c0…

MALICIOUS

PDF

82.7 KB Created: 2021-04-06 19:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d233bd682d29d8c71864b442accab999 SHA-1: 22bf96ac398062c1569862e93d3ecbacfb5d5da0 SHA-256: 0a603238e8eb60c063899c52ec8ad6b0065cf589f4080ebab861c10614e4d6e3
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of the external URI suggests the document's purpose is to redirect the user to a potentially malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wb?keyword=connecting%20panasonic%20cordless%20phone%20to%20base PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486206/normal_5ffb35802b041.pdfIn PDF document text
    • https://cdn.sqhk.co/sofawaju/bQsbliY/cartoon_network_arcade_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/inuh3yy/96377442337.pdfIn PDF document text
    • http://gelchlen.fun/paintball_paintball_near_mevw0d9.pdfIn PDF document text
    • https://lapaluletegole.weebly.com/uploads/1/3/4/6/134679291/wagux.pdfIn PDF document text
    • https://wujojebexubab.weebly.com/uploads/1/3/1/3/131380870/situnawa.pdfIn PDF document text
    • http://proita.fun/modelos_de_control_de_inventarios_ejercicios_resueltosa1qxy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405652/normal_5fef5252298cc.pdfIn PDF document text
    • http://bestunew.xyz/algebraic_expressions_worksheet_tes1fuvw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467912/normal_600a586e89297.pdfIn PDF document text
    • https://cdn.sqhk.co/surofowudula/gf8q3qS/10848137217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449615/normal_5fda82bdd1380.pdfIn PDF document text
    • http://lishop.site/31065018317i8npx.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/bubeto/30_day_vegetarian_ketogenic_diet_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/becker_cpa_study_material_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/1971517488.pdfIn PDF document text
    • https://e2685184-9bcc-4d63-b126-5f7cf6655de3.filesusr.com/ugd/267f13_6851a15e125544d4b88cc04c655450bb.pdf?index=trueIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_22073798f221492e8822a6175b84cbf6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E8 5288 bytes
SHA-256: ebf51d64bcee9fcfb14ff90a25bf72a21581de629e22dc5a2866bc3da26695a3
font_01_sfnt_off00010ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC9 10728 bytes
SHA-256: 26fd699fad821edc911d367c79eebcdf979937ae1f3487d21f7504744b1626eb
font_02_sfnt_off00012f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8B 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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