Malicious PDF — malware analysis report

Static analysis result for SHA-256 788405f9c0e2751c…

MALICIOUS

PDF

70.5 KB Created: 2020-12-26 13:49:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4a33bbf1a192eab15aed97361f7ed988 SHA-1: 6e71fcc99f8721417ceccad9ff1946aa0aa276cf SHA-256: 788405f9c0e2751c7ae32e6db465428fdbeed56ee7f29a9f9513ec00de1c5c92
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document is designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

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://traffine.ru/123?utm_term=usps+bulk+mail+form+3600-ez+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479214/normal_5fc7b8af64d1a.pdfIn PDF document text
    • https://jidugurulepapol.weebly.com/uploads/1/3/4/3/134310086/pagivevidonogivubizo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417208/normal_5fe238d18feaf.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/53940f43884d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375210/normal_5fe314d2353bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5f8cc783e9752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421623/normal_5f97597256f77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cedaec40-98cd-46ac-ab7e-74a896e6423f/89557726197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf3f03fc-7a9a-4c86-ae13-a9ed0cca073b/47239062234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9389c08-bd52-40a2-bd33-38e03149fa5b/glencoe_virtual_lab_dna_and_genes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4045147-0e5d-4de2-86b4-f7a03d12fbd8/12153697264.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/panchatantra_stories_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/bhartiya_samvidhan_full_in_hindi.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_off0000d318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD318 5916 bytes
SHA-256: 48d6c3c116ff9e04fafd9bba01b76ec00c3e46f14370099cd50c467788feddf8
font_01_sfnt_off0000e733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE733 11348 bytes
SHA-256: e3c7d966808754d732439f059383cc02f5ebb2f155285f9d98fb16388c460fd8

Open this report in the interactive analyzer, or submit your own file for analysis.