Malicious PDF — malware analysis report

Static analysis result for SHA-256 be1f3bc33f71b50e…

MALICIOUS

PDF

64.1 KB Created: 2020-11-25 03:00:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 363340bcef0d6dd2a7fc1524abe20392 SHA-1: d6c98c6b614173bf0b3fbea34e503ea2e70776e2 SHA-256: be1f3bc33f71b50e7a3d2b3417fcc833ffe3883b3e1e3e500aa34c3444e3f9e5
214 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute malicious content. ClamAV detection and ML classification further support its malicious nature, indicating it likely serves as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=civil+wars+billie+jean+guitar+lesson
    • https://cdn-cms.f-static.net/uploads/4384295/normal_5f9b399120d7e.pdf
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f87f56cf25ee.pdf
    • https://xazojitov.weebly.com/uploads/1/3/1/4/131408465/zewabejera.pdf
    • https://guburumo.weebly.com/uploads/1/3/4/3/134322172/wixisox.pdf
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f8b4a0ceeb6f.pdf
    • https://judirarizase.weebly.com/uploads/1/3/4/6/134645007/rapivafuguzefobexuzu.pdf
    • https://ruwopevod.weebly.com/uploads/1/3/1/3/131397973/8413235.pdf
    • https://nofevezim.weebly.com/uploads/1/3/4/7/134770192/cc059af9720.pdf
    • https://cdn-cms.f-static.net/uploads/4427821/normal_5fa23f8ad74ef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fejififimaketo/jozafapa.pdf
    • https://uploads.strikinglycdn.com/files/e7e73ce1-116d-4787-9e16-a2b5572fcd2c/3576343668.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdd1.bin
60f1d1a61c9fdbf01daec94f127c936e9d11c839fb10360facb8b4b71e670487
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD1 5128 bytes
font_01_sfnt_off0000cf65.bin
d9ee46d4e1f88932e97eea3f931aba73d93e5a08801d3503e5c9d83bd5a6200a
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF65 10716 bytes