Malicious PDF — malware analysis report

Static analysis result for SHA-256 302cb8bfca30f7c1…

MALICIOUS

PDF

66.7 KB Created: 2020-12-13 14:16:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 13b5a1b702eb07a50267441ffb38d4dc SHA-1: d1a3ec21c94049fbd4f0c4c97a763b559d520441 SHA-256: 302cb8bfca30f7c1f59e88f100c71835db2c329fc4154040a6d774c6ef745d9b
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, traffmen.ru, disguised as a worksheet. This indicates a phishing or social engineering attempt to redirect the user to malicious infrastructure. The ML classifier and ClamAV detection strongly support its malicious nature, likely as a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/strik?utm_term=chemical+reaction+worksheet+doc In PDF document text
    • https://posodukur.weebly.com/uploads/1/3/4/3/134347560/99ddbe05.pdfIn PDF document text
    • https://bizidijekivaza.weebly.com/uploads/1/3/4/5/134502856/gibuxofadetobejusi.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/6158398.pdfIn PDF document text
    • https://suzagosezamonu.weebly.com/uploads/1/3/4/4/134446802/8000030.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/wotodedaruzuk/lijogutukozefuresoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2edbb894-5b67-48c1-8657-5e963285042e/38022060305.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc19e291452f90b7fea6729/t/5fce6364f94b6402b24e7a5b/1607361382548/buy_bamboo_paper_products.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/howard_miller_christmas_wall_clock_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3429521b-73ac-4ed5-9c4a-b3067cc70b1d/basasujapomasujuk.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/dj_golu_babu_bhojpuri_song_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f385f9866f3fd2d4a131/t/5fca092e9309303fb836b521/1607076142348/namubefazizufuwovinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/110b81f0-78e6-4600-b92c-b0dae5479b6e/82879090297.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe105f4f98375720a7f101/1606291552278/63531517465.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c87788c99b6d37a67a80/t/5fc1152f08845d0924b0bf6c/1606489391393/48376041372.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_off0000c887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC887 5240 bytes
SHA-256: 174d150b482243cd3bbbcdd27ee3541619ee311ae6efc6b706ff5bc6e6f1447b
font_01_sfnt_off0000da35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA35 10448 bytes
SHA-256: 4f5702d92d238bc150875bd6ba87cd7956bec286b9da824575c4ec123d67ed7b

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