Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac754864ea0a48f3…

MALICIOUS

PDF

64.7 KB Created: 2020-12-21 18:23:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d945916635c2d5a2a4dc096db0bed673 SHA-1: e5aba576c1254ed6624caac90e83bd95fe1e6273 SHA-256: ac754864ea0a48f33c62408adf100dfa81f64745b23d3a1dc9ff752c35b4869c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing or malicious document, including a link farm and ClamAV detection. The embedded URL `https://trafficel.ru/strik?utm_term=iphone+xr+space+wallpaper+4k` suggests a lure for users interested in wallpapers, likely leading to a malicious site. The presence of multiple external PDF links, some pointing to benign content and others unknown, indicates a potential SEO link farm or a distribution mechanism for further payloads.

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 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://trafficel.ru/strik?utm_term=iphone+xr+space+wallpaper+4k PDF link annotation
    • https://zuduloto.weebly.com/uploads/1/3/4/6/134623707/gebek-lilafirajupa-vodene.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/kitakilesa/66287774254.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/pikasejesopisir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d78cc9f6-f576-4516-b54f-4f557af3bf52/phonics_ai_ay_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36a04223-a4b2-4411-9903-b65d5125e5c1/nodijapokipozomabapuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71cc5f4d-a0d6-4542-9817-95f20bd9dc92/bevufosaniduraronik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6db42504bb4653ce19d0c/t/5fd6a41613a48350e81cc5f5/1607902230962/34863245642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1eeb0fb-a141-43b0-84fe-ae35e85c68ae/adobe_photoshop_cs6_cracken.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc645f12e537a05ef2d9efe/t/5fd6d86772b1137fa987b4cb/1607915624864/91084048840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72a60bf-674a-43b7-9447-ce9e777ab901/trx450r_manual_cam_chain_tensioner.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc595465e8e827d42adb05d/t/5fd6dc3fe5ac582896346722/1607916607917/define_the_concept_marketing_information_system.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_off0000c156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC156 5268 bytes
SHA-256: 6f096faec33ba38ed29a00a7e4743071e458796dc6ee0d5f5041e84b6eed27da
font_01_sfnt_off0000d358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD358 10448 bytes
SHA-256: c48b05d7c5b8344cb373e6d1abb3f014ca6b181e1412fd0e9f62e9eaf323f0ec

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