Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46ba45ac22405bf…

MALICIOUS

PDF

78.6 KB Created: 2020-12-23 00:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4f0d0e26e48e5376e9c42590a0654d71 SHA-1: 9701abf6bb17d11761b5c2715c601b87b774186b SHA-256: e46ba45ac22405bf04813f4145c3dc037f1e0f4b092d1e8497f7e38ea1ea5295
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 a high number of external links, many of which are to obscure or unknown domains, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a large number of links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://trafffi.ru/aws?utm_term=major+depressive+disorder+guidelines+canada PDF link annotation
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/papeli-vuraxagigus-sevuda-pebono.pdfIn PDF document text
    • https://xokosawebajufad.weebly.com/uploads/1/3/0/7/130776850/fofigos.pdfIn PDF document text
    • https://gidujinogojavu.weebly.com/uploads/1/3/4/0/134096303/kagaruw-kenirajalim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454172/normal_5faef73d9c234.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/dinigugaxej/short_reading_comprehension_passages_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94e93ac9-bd5d-40a4-9684-60be6e126b79/nypd_police_radio_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/moen_mf2861_vertical_spa_installation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c6dfd9-a0d8-4b17-8ecb-3edb9dec876b/tidetosojesan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb76f3ff-3895-4bf6-a801-c6125888b4dc/84680044566.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/97845380006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff742b1-7b1d-44b2-bc6d-9d6a44d8963f/16061262300.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/pm_awas_yojana_rural_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a40363-a68f-49bf-8bd7-aff38346cc01/crime_and_punishment_shmoop_part_5.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_off0000f3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B4 5384 bytes
SHA-256: 2606d72ea74a6403b696643893a11a2380eaaaf286be6ca421e4d029569d9656
font_01_sfnt_off0001062b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062B 11460 bytes
SHA-256: 0f57e26cb3b94dedc7b6db8ea700a4674087597feb9664f2ba93487752c5e4ea

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