Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f29d1e640c2087…

MALICIOUS

PDF

60.9 KB Created: 2020-11-11 11:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3015a34c8a11e050d23acc21c11e7237 SHA-1: be74c95765ff4ed1c41cfe0d7e2d5f1536a4c7b9 SHA-256: 47f29d1e640c2087c9e5324428c20ec16e56ede11ad1f8c082bd697f54290f5c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The document body, though truncated, suggests a lure related to 'Pearson envision 2020 log in'. The presence of numerous external links, including one to 'traffnew.ru', points towards an attempt to redirect users to a malicious site for credential harvesting or further exploitation. The PDF structure itself contains multiple embedded links, consistent with a link farm or phishing distribution method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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
  • 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/123?keyword=pearson+envision+2020+log+in
    • https://cdn-cms.f-static.net/uploads/4378856/normal_5f90d602116b0.pdf
    • https://cdn-cms.f-static.net/uploads/4382429/normal_5f8d6b5517917.pdf
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5f93133f4f0bc.pdf
    • https://cdn-cms.f-static.net/uploads/4425926/normal_5fa0a81581312.pdf
    • https://basivukapipex.weebly.com/uploads/1/3/4/5/134528325/velerike.pdf
    • https://bonopabugo.weebly.com/uploads/1/3/4/5/134581776/zawijikewe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/79f2af5e-3c86-4931-a323-5b8b8272c09a/daxutuk.pdf
    • https://s3.amazonaws.com/vebogotexaf/rovafosufikipu.pdf
    • https://uploads.strikinglycdn.com/files/b9a1c9dc-fa54-4e33-b10d-58541971b7f5/bowizopewawer.pdf
    • https://uploads.strikinglycdn.com/files/c1a59e18-e38d-4663-9524-9215cdc7514e/37596594633.pdf
    • https://s3.amazonaws.com/gelawiweza/vupofetikewibibuwepud.pdf
    • https://s3.amazonaws.com/mamibis/84367401069.pdf
    • https://uploads.strikinglycdn.com/files/bdf32c55-69de-4761-9253-87b40e70025c/11099550321.pdf
    • https://s3.amazonaws.com/gazitif/plural_nouns_worksheets_4th_grade.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_off0000b06f.bin
d833b64474056cf294547282aecc2a8831a45b63a02c4cc06f96082bb5cb217a
pdf-font-stream PDF embedded font (sfnt) at offset 0xB06F 5188 bytes
font_01_sfnt_off0000c22d.bin
ee0714c5d1dfacf922d59566aa82f6ca895cf4e7dca42b773696e469c5fee80b
pdf-font-stream PDF embedded font (sfnt) at offset 0xC22D 11124 bytes