Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b01db9752ed83dc…

MALICIOUS

PDF

81.6 KB Created: 2020-11-18 11:02:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e7a933b4c4008448f8ca4cfbffc41d29 SHA-1: e011c1af325835468ad31b8b179e3368766cffe2 SHA-256: 2b01db9752ed83dcd95d69114d93a22bbba1e8017bcee5d6c03c3d790aecf7d0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier returned a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with one pointing to 'https://traffnew.ru/aws?utm_term=photography+website+templates+bootstrap', suggesting a phishing or spamming lure. While no scripts were explicitly extracted, the presence of numerous external links and the overall detection profile strongly suggest malicious intent, likely related to phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffnew.ru/aws?utm_term=photography+website+templates+bootstrap PDF link annotation
    • https://xulavuxedipi.weebly.com/uploads/1/3/4/0/134017657/646661.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/falevi/santiam_pass_weather-oregon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b014a98-827c-4950-8c71-616dce869bdc/38014950885.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/lufuxidibiloravi.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/environmental_science_powerpoints_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/artemis_fowl_the_last_guardian_weebly.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/zizixid.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/kasus_jantung_koroner.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/create_email_template_java.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/major_broadsheets_in_the_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/38162366251.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/69007757330.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/naduxadalutomuzonudaj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58D 5252 bytes
SHA-256: f6655490e76d8c04253ecccac018efb907305c3e65d05767e90fb36a31f27fc1
font_01_sfnt_off0001077d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077D 10436 bytes
SHA-256: 93c4575e0e7c268be5034a4e446df76816be3f160e273e74979bbbe514cefbdf
font_02_sfnt_off00012b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B35 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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