Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8a2eb2d7c6e8b8…

MALICIOUS

PDF

76.4 KB Created: 2021-01-01 11:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7ebf97cf8a9d076b7f27d3d029fac61e SHA-1: 9306af409fbcc01fba0e53dd1d19b75a7cdc83fc SHA-256: 0e8a2eb2d7c6e8b8eed9f0877034be863730aa1cef65dedd5db0dbd02d895dfb
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it's a malicious redirector, specifically designed to lure users with the promise of a 'zombie frontier sniper mod apk'. The primary IOC is the redirector URL, which is known to lead to malicious content. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffking.ru/strik?utm_term=zombie+frontier+sniper+mod+apk+revdl In PDF document text
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/zekakosuxo.pdfIn PDF document text
    • https://fuwewarudizikip.weebly.com/uploads/1/3/4/6/134644733/8921145.pdfIn PDF document text
    • https://xeludopoveju.weebly.com/uploads/1/3/4/5/134528604/9b4b5d470721.pdfIn PDF document text
    • https://cdn.sqhk.co/zadirajuviku/giifja5/business_management_quiz.pdfIn PDF document text
    • https://zamigalimigarub.weebly.com/uploads/1/3/5/3/135326483/4868435.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/gNpjgij/pulse_point_fire_watch.pdfIn PDF document text
    • https://cdn.sqhk.co/jumibizede/hjVKget/world_war_1_summary_of_the_great_war.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1900570b-973e-47b5-926e-1ced4ef66a10/zuvuvodupedulemikured.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/80674862042.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/xoroposofasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab55b4a-1f0f-4cee-8463-9dc59216c177/20083252244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e5faf6-0499-4507-b25b-c671e54e5069/89313335634.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19A 5196 bytes
SHA-256: e76a93c7549e210222da4c80ae594c891533b8795fbf259b7f62531c2367447b
font_01_sfnt_off0000f32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32C 10396 bytes
SHA-256: f24220dcd92741c024403e6f0ccd5864dcf5e0bfbe8f7cd9bf18afab24b37621
font_02_sfnt_off000116d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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