Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bde22b098b4efc5…

MALICIOUS

PDF

71.5 KB Created: 2021-06-12 09:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1939fa9e1829ffae9a49a582d10162a2 SHA-1: 1ecfdca24cb1cae0988be110c5880dea4e4f273e SHA-256: 2bde22b098b4efc5a7b26da03ee2b142c3b51bffdaf20df17bdcc0bb77e79c56
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 0.9997

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://allytemp.ru/pbw?utm_term=state+of+decay+2+mods PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4527357/normal_6027d6c0e3692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424010/normal_601df643cf35b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488842/normal_601ab7fb3ead9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446765/normal_60290034ead48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473062/normal_5fd2784de4007.pdfIn PDF document text
    • https://kozizekovina.weebly.com/uploads/1/3/4/8/134891358/3f1fc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404730/normal_60ba6ef2acdac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401973/normal_60136251b3d96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454303/normal_606ae5b08cd98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385020/normal_601484a8cb283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448347/normal_604dcb001260b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_60b8392d72c94.pdfIn PDF document text
    • https://xurekibovadava.weebly.com/uploads/1/3/0/9/130969225/f10cbee.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/034d9cac-ab14-4cf3-afa8-707b1e2624e4/pisuxepebigupobi.pdfIn PDF document text
    • http://tuluxevan.pbworks.com/w/file/fetch/145114317/fukigefotadin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d4238a-e732-46bc-8039-1757f3c86cbd/britax_marathon_car_seat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff36ba9-97cb-4593-b406-83b2d6496147/wo_ladki_nahi_zindagi_hai_meri_mp3_song_download_new_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1d7bff-5327-437e-b9b8-9b4b1f928d92/78362742720.pdfIn PDF document text
    • http://lesokulovisu.pbworks.com/f/71903806141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab6e1b81-73fc-4da3-b609-d88d044966fe/30184632464.pdfIn PDF document text
    • http://jadudekif.pbworks.com/w/file/fetch/145073580/forming_nouns_from_adjectives_worksheets.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_off0000d8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E5 5376 bytes
SHA-256: 673bfaf6bcea2e5c85807d9654f9d620e6476250ce94ca459a9870b0f2151889
font_01_sfnt_off0000eb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB32 11716 bytes
SHA-256: ccba7fe6f6b479280c3a560d31ed436a0c13887eb0e793a65b4ce5e88b1119f4

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