Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0510b27924de35…

MALICIOUS

PDF

78.5 KB Created: 2021-03-18 19:46:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6200ac471627bc39081a064a3b0c1611 SHA-1: 2549fdd1412b3eb3dfcb2a1e4ad8af8fd979b23a SHA-256: 9a0510b27924de3591594972cbaa2e7da3e72ae07eb44e8964019be35c321fed
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and link farms, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://botokaw.ru/strik?utm_term=why+soccer+players+don%2527t+lift+weights PDF link annotation
    • https://bibatajikoxego.weebly.com/uploads/1/3/5/3/135315017/duditaz-xoxigev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417422/normal_60257148c147b.pdfIn PDF document text
    • http://losinglotterynumbers.com/betupufagubalixamaresxf12u.pdfIn PDF document text
    • https://sefokuto.weebly.com/uploads/1/3/0/7/130738721/jotorovifetisa_boxunipok_gopojiraxinor_rikif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450883/normal_600fba35c658a.pdfIn PDF document text
    • https://sijerixo.weebly.com/uploads/1/3/4/0/134042725/4619518.pdfIn PDF document text
    • http://nesobaka7.xyz/9719355729937t3m.pdfIn PDF document text
    • https://sijotifibiga.weebly.com/uploads/1/3/0/9/130969940/gugoperu.pdfIn PDF document text
    • http://sodalabs.pro/indirect_object_pronouns_in_spanish_worksheetzq27i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_6025a45b40e50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466689/normal_5ffd38adeba7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416796/normal_603592d6f1cc8.pdfIn PDF document text
    • https://linebabeta.weebly.com/uploads/1/3/5/3/135317009/rabukudopotavefu.pdfIn PDF document text
    • http://wexypay.icu/value_investing_benjamin_graham_booko4kye.pdfIn PDF document text
    • http://goodsun.fun/origami_3d_swan_instructions_step_by_step1mkd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_5fd8318a17c73.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/wavunot/letekujefeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3564651-1eaf-45f7-b249-5265b5861bf2/14449718806.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/xalesidivopu.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/rizusuvigekomufoxebagezug.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/live_football_tv_streaming_2019_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/geography_quiz_questions_and_answers_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f0feba-1787-4b4a-9277-eecac5494eac/rapujozusonolikuk.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_off0000f44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44C 5656 bytes
SHA-256: 05b3ddf9bb57f17af506ab6253c7b810f15c785a883e926810ede91b3cce0786
font_01_sfnt_off000107b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B5 10792 bytes
SHA-256: 02146cf6e3f0451b1713699c30278a8a26f595a7507caa0c2043f0718a0516d7

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