Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a6ddb660aab8ad…

MALICIOUS

PDF

71.0 KB Created: 2020-12-22 04:46:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 183e4fdc5e827220b7f66d80dbe347ff SHA-1: 971f1959e581261e14ad3177ae8421327fc511de SHA-256: d5a6ddb660aab8ad4ee112de4b1d3fe5cf7e27944f276f573387a5095b36e6c7
156 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, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or distribution network. One of the primary links directs to a URL that appears to be part of a SEO-based lure, further supporting the phishing or scamming nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/aws?utm_term=critical+analysis+outline+template PDF link annotation
    • https://nejavedejelije.weebly.com/uploads/1/3/4/3/134336697/a097e0.pdfIn PDF document text
    • https://nogulumu.weebly.com/uploads/1/3/4/4/134476008/3366700.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/wewosumigapari.pdfIn PDF document text
    • https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/rijuvinibijofuvu.pdfIn PDF document text
    • https://pufotawimudob.weebly.com/uploads/1/3/4/3/134380049/8188247.pdfIn PDF document text
    • https://jewezuwexokuj.weebly.com/uploads/1/3/4/7/134717424/3239325.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/be1c3dcd071e.pdfIn PDF document text
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/016f83fe.pdfIn PDF document text
    • https://kijabejinal.weebly.com/uploads/1/3/0/9/130969506/2642466.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/gizonukorad/tigafokibuzoji.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/61980864334.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/pusibor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca36c51-bf78-4841-bf4c-903759ee2279/42413623368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ba5459d-0b56-4e11-8b3f-80f71bc59cdd/satosuzajixuma.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/beneath_2013_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e255219b-6b9d-48b0-9628-83cd92ed8cbf/bexunepo.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_off0000daf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF4 5084 bytes
SHA-256: e31ea267cd52d9d3b4f95d33df1090c11b4a11d8b0b3505e22a9644da145b9bd
font_01_sfnt_off0000ec2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2D 10312 bytes
SHA-256: 722379282bde3a8d866a2322f457e800ca63b0772543139a9e4e67f80d0c1ebc

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