Malicious PDF — malware analysis report

Static analysis result for SHA-256 714bb0746bc5c75c…

MALICIOUS

PDF

137.9 KB Created: 2021-01-06 05:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 12ec2e66f7c19c7a7efe2d79341f8814 SHA-1: e7617dd9bed093d3a7cf9c1e5ec4c088c8ad6a6b SHA-256: 714bb0746bc5c75cc4f89d3d1ea25b8bf4d60599ff9798ceac3e9e4584c2c92c
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, and contains multiple links to external resources. One critical heuristic identified a link to known malicious redirector infrastructure, specifically `https://traffmen.ru/aws?utm_term=george+washington+biography+book+pdf`. The document body, though heavily obfuscated, suggests a lure related to a "George Washington biography book pdf", likely intended to trick users into clicking the malicious link. No scripts were extracted, but the presence of numerous embedded URLs and the redirector link strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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
  • 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.
  • 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.
  • 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/aws?utm_term=george+washington+biography+book+pdf In PDF document text
    • https://vopipogumibuwel.weebly.com/uploads/1/3/1/4/131453394/gunek.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/5e8d75070a.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/ijiQhe9/pabugibumimo.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/wekibik/jammu_university_6th_sem_date_sheet_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/the_go_getter_book_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ffc7e3b-cf99-4fc0-b218-e09cce2ee181/39224260968.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/4856524932.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/49875236715.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/gugovevitafamovune.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/2374051573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afd89d5e-fb19-4015-b5fc-d9a817178592/bumijamofanusakez.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_off0001ce77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE77 5488 bytes
SHA-256: c3caa9c8906ed029787dcd64190b8cd7512bf3dd21bbede0fc03107bc44ce766
font_01_sfnt_off0001e135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E135 13728 bytes
SHA-256: 0405873e549660eee8d5cccb480a8db109277b6d72e234977212333faa7d869b
font_02_sfnt_off00020c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20C10 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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