Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b057122221e80ed…

MALICIOUS

PDF

74.2 KB Created: 2020-11-17 12:22:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a8af6042c77955d7b29d9f29d6e6557e SHA-1: 99bbff7140b6ec384dd3c69724ba65069eee46fc SHA-256: 0b057122221e80ed0585dc218aadf081ef29a9b1eb8a3b5753a2596ac9ee424c
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=radio+shack+pro+197+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385010/normal_5fa603dcbd143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464734/normal_5faf522c1b60d.pdfIn PDF document text
    • https://ratomewupevo.weebly.com/uploads/1/3/4/2/134234569/rokovotedutasofed.pdfIn PDF document text
    • https://pekedilude.weebly.com/uploads/1/3/4/3/134324883/jeropubozesuzi_lekop_kedabosuf_xomuvuva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447874/normal_5fa906125e803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f9da679a85f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419846/normal_5faf3ab4c7c80.pdfIn PDF document text
    • https://zufugorutamivas.weebly.com/uploads/1/3/4/4/134401118/zomexike-wodukalutijev-jalilulikefiv.pdfIn PDF document text
    • https://tevosomevovek.weebly.com/uploads/1/3/4/6/134697335/08306a6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412380/normal_5f97a607381f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f8750af76980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401505/normal_5f9bdeb07c3d5.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/pisik/aashto_roadside_design_guide_2006_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/12586205973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9197ed98-e858-4579-9321-5eb30e4db7c7/the_3-1-2-1_diet_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/314711c4-69f3-457e-a11b-23d79200d9fc/wilco_learning_how_to_die.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_off0000e622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE622 5672 bytes
SHA-256: 66747426c031c964bde6e385b56b66b1842bd615a1a6ada44ca9d24398686fac
font_01_sfnt_off0000f955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF955 10092 bytes
SHA-256: 55f9a367950e2cea1c4992368911df4603bca28a3913ad2dd88a90dc81aacf19

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