Malicious PDF — malware analysis report

Static analysis result for SHA-256 5346e9520360d7e6…

MALICIOUS

PDF

77.8 KB Created: 2020-11-23 02:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a890f39e2f211445b22e79f3875e76b3 SHA-1: 35aed52c45fd1807c3e993562167ff007567bd80 SHA-256: 5346e9520360d7e66f4fc89da60b20ee06c7089a5c9e428cfdc80771c138caf5
244 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, and it contains numerous embedded links. Several of these links point to known malicious redirector infrastructure or are part of a link farm hosted on disposable domains, suggesting a phishing or SEO manipulation scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lure 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
  • 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.
  • 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.
  • 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/123?utm_term=personajes+de+el+cartel+delos+sapos+en+la+vida+real In PDF document text
    • https://bofezukidev.weebly.com/uploads/1/3/4/4/134464138/8447967.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/zaxaxisa.pdfIn PDF document text
    • https://narigepafosi.weebly.com/uploads/1/3/4/4/134471788/5853452.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/kenilirokaju_ximojukaf_segavev_powizetu.pdfIn PDF document text
    • https://morutasatosode.weebly.com/uploads/1/3/4/3/134366393/e68a2c6d.pdfIn PDF document text
    • https://notupazepikinis.weebly.com/uploads/1/3/4/3/134382888/3335764.pdfIn PDF document text
    • https://mapawoxerefer.weebly.com/uploads/1/3/4/7/134703144/boritetilipi.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/cd437b0e-ca0d-406b-8535-8ad3ee09ae35/2566477340.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/tifivumubakok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbb2473d-21da-48ed-ad2f-89419d004f15/a_giacometti_portrait.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd75cdd5-ac89-469e-a1a9-1c74d27522e8/clip_art_blood_droplet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aff0a1a5-6ff1-4761-86fb-cf47d50135d8/day_trading_and_swing_trading_the_currency_market_free.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_off0000f12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12C 5204 bytes
SHA-256: a43de7f6ffb12c2dd001602314158942108afe3a3636ea86b40c2f9b1052e5b2
font_01_sfnt_off000102f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F9 11368 bytes
SHA-256: 2e024bec727b876b1f729917f962d196759bf8ba422c8c58709c52480b62be37

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