Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f505a3ad9a0b3cc…

MALICIOUS

PDF

64.4 KB Created: 2020-12-04 03:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 24ec185bf1e3bd1305e2cc5ae4b64c67 SHA-1: e7b7456d8549a267f9ca68fd6a547324e498fb08 SHA-256: 5f505a3ad9a0b3cc249f8025cb42e549afe3067f14b699898f0cc7e828cac271
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to disposable hosting and utilize UTM parameters, indicating a link farm designed for SEO manipulation or phishing. The primary URL, 'https://traffnew.ru/strik?utm_term=toledo+ohio+whitepages', suggests a lure related to personal information lookup. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely related to phishing or directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffnew.ru/strik?utm_term=toledo+ohio+whitepages PDF link annotation
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/weginafeniwajazinivo.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/3a9d05.pdfIn PDF document text
    • https://vurofagulomefu.weebly.com/uploads/1/3/1/4/131452840/8332107.pdfIn PDF document text
    • https://tenaxolisus.weebly.com/uploads/1/3/4/6/134654195/vowunenu_zofifilatitu_tobize_kitamobipewej.pdfIn PDF document text
    • https://varavedonenen.weebly.com/uploads/1/3/4/3/134316352/relunarudari.pdfIn PDF document text
    • https://xurizuful.weebly.com/uploads/1/3/4/8/134898541/betatim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0feaf0a2757459be36412/t/5fc3382c6457125654a4de81/1606629421543/wasabi_power_gopro_charger_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/nawemaliwilebiju.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd745bcb0228a2824d01/t/5fc27379f3de5e49b5b3bdd2/1606579066876/composer_biography_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abd3a4c7-295a-4fb2-83e6-27b396c34ea2/36315594626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbdd8d2-0e6b-4ee8-b0e0-0a0e0ec17061/2700173413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34f88105-9d09-4669-bd6a-c29da3bc00fd/4338627868.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfb011491241adc458e21/1606220553739/subway_ultimate_spicy_italian_calories.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_off0000bfc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC7 5168 bytes
SHA-256: 8671ab67dbbde692eb795fb907987c2eac23e236138e20363b514e153b0eac1b
font_01_sfnt_off0000d16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16E 10660 bytes
SHA-256: 2eba3862af435d52fc87ef489b9116c519a203ea0f036dfc981764f57e3089fd

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