Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a09166cdb6d6df1…

MALICIOUS

PDF

79.0 KB Created: 2021-03-27 14:25:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9ac488868316b8867f5acb7546fe51aa SHA-1: 0e6b0e103c1b1c9e7b5b997e9044fe7ade7afda5 SHA-256: 5a09166cdb6d6df1b9b17b5503dab60dfb814bcc4a98674699ea766acd1411fe
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('lozipotod.ru') that is likely used for phishing or malware distribution. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links on disposable hosting, reinforcing the malicious intent.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://lozipotod.ru/strik?utm_term=does+graham+cracker+crust+have+eggs PDF link annotation
    • http://mikovil.mywebcommunity.org/xopetikixumoba.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/beleske_jedne_ane_download.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/gdCnAAc/tizuwusivatujo.pdfIn PDF document text
    • http://jiteruruw.sportsontheweb.net/rutexa.pdfIn PDF document text
    • https://cdn.sqhk.co/vumivatuvi/U1XZ0Vr/prince_charles_blade_runner.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415080/normal_5fdebd92cc886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424689/normal_603142ec08bf7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375073/normal_5ff8e57c206d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474176/normal_5fd11ab8ed588.pdfIn PDF document text
    • http://golixudib.mypressonline.com/powershot_sx510_hs_wifi_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_71d9a51ffa6d42fc818cd415b2600716.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d586dd-8d89-46b0-8990-5471556eaf7d/wowowokofabuke.pdfIn PDF document text
    • https://a86b13d2-a9ad-4039-ad74-10d2f7332aba.filesusr.com/ugd/6e2451_3656ec5a68a243cfb6f8c12405db003c.pdf?index=trueIn PDF document text
    • http://totuxivez.onlinewebshop.net/fybcom_mathematics_statistics_book.pdfIn PDF document text
    • http://vuxebezedigelun.onlinewebshop.net/pigaxizuxifetasime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97d8a1f-3b11-4082-a5c3-ab39cae9b6b3/26962557191.pdfIn PDF document text
    • http://jatoxat.atwebpages.com/64454167994.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_off0000f697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF697 5304 bytes
SHA-256: 42a67656b4ea68859324c7662ded702f053807e4230c7e4fef4a80308cbe4346
font_01_sfnt_off00010888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10888 11288 bytes
SHA-256: 24458bed4ea9da520f2180435590e95a9264eb6c845bf648c44427117e1a772a

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