Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad654539700fcf1c…

MALICIOUS

PDF

80.7 KB Created: 2021-05-29 21:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 39dea13d38244733d14e92b9983a412e SHA-1: 1e46e5c0e3a8dca4d21b6198cbdb6f8ea084d168 SHA-256: ad654539700fcf1c63864e414c14f474ae656dbd9193a4ed7d66ec7c161fc20c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/123?utm_term=apa+format+citation+bible+verse PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374369/normal_5fd34d4d0d3d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447087/normal_600998ced0fc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374963/normal_600cf028539dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471099/normal_6018c38de5505.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_604a5a9e0d616.pdfIn PDF document text
    • https://zifimebitumane.weebly.com/uploads/1/3/4/2/134236425/05c935e563dd61.pdfIn PDF document text
    • https://kutekedutowake.weebly.com/uploads/1/3/4/6/134635623/xulajov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422631/normal_5fd91932047c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443812/normal_6005114241b66.pdfIn PDF document text
    • https://jesilezozuzi.weebly.com/uploads/1/3/4/7/134745232/mujativ-kesotixiberepe-kagit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388162/normal_5ff162a3d95cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461207/normal_5fe6f08d9055d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370090/normal_5fe4120f568b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414156/normal_6011c5983d255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_60617a268d793.pdfIn PDF document text
    • https://fuliribak.weebly.com/uploads/1/3/4/6/134681530/09abc07eebfa4f.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/c45c2960-8c55-4bb1-84c8-1b195a4baa33/book_of_giants_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f513074f-f4c7-4ca2-994b-ae155df36908/lefetimivopozerikewenaxif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6897e0e8-95e5-4e6e-9980-3d54c6f68240/31289472372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2eb10a6-7129-4738-bb04-16a134e3cf1e/wodomexuwul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cf4cba2-f917-424f-a3b8-cd98ccb30818/walmart_pharmacy_hours_plano_tx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be8c119-a52f-40b7-a05b-bb79d651b6d8/the_mysterious_benedict_society_and_the_riddle_of_ages_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55bc3942-7651-4cd3-bda2-575fe80fdd23/nclex-rn_questions_and_answers_with_rationale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e209b0b1-a8f5-442d-aea1-04f743388fc7/30499126437.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_off0000fb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB41 5352 bytes
SHA-256: bb8f7bc33fe1e66fa501f04e362b0606f0b7fb1ecf54cec680e167f761e970f8
font_01_sfnt_off00010d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D65 11440 bytes
SHA-256: 6787b94055049732f223bb54f57dd61de00197ead847ae7fe54a1792c22a0dbf

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