Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8164ca1b5ed7743…

MALICIOUS

PDF

66.5 KB Created: 2020-11-20 08:20:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bdcb9b34717d34159aa5f7d5cad5cc6d SHA-1: 56ee3b9d45a9aab9eea8f836b39290651a358bc6 SHA-256: e8164ca1b5ed7743eee1fe60560c4b5be9c05b2e339098d4faa308c55300b114
212 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating a phishing and redirection lure, specifically mentioning payment redirection and fake invoice content. The presence of external links, including one to 'traffine.ru', suggests an attempt to lead the user to a malicious site. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/aws?utm_term=edit+estimate+template+quickbooks PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369308/normal_5f880b4d97e1c.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/godekux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370269/normal_5f8ea90191a51.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/4589730.pdfIn PDF document text
    • https://tijikazi.weebly.com/uploads/1/3/4/3/134373218/2066460.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/7ba32da0-6f32-4519-a5c3-d1b33bdc1ddd/jw.org_bethel_application.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/tabozinaxijegepirut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d1311a2-292b-4300-90ee-2b8a08dd2a03/19717347967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/543170c0-9f0f-49ea-8de9-0a5259ae8c1d/kunawibotubowirelalofuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/439dddf5-cc96-44de-90ab-fb3b54d98f7b/luvokaxovupeneluvobafik.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/history_of_muslim_scientists_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/ieee_paper_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/into_the_lion_s_den_imdb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f6afcd3-c3a1-4f68-b31f-829722aa0127/wireless_adapter_for_samsung_smart_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/exponential_functions_worksheet.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_off0000c6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F4 5412 bytes
SHA-256: 78369f8038e3f34a8d0360185f1e474c1bfba9f3c14d7a4c52a41f6fc366bd45
font_01_sfnt_off0000d943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD943 10588 bytes
SHA-256: 03f88053da15f78f5654500aea5c88ded9aef3600c829496ca6f0ce1c8c089d5

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