Malicious PDF — malware analysis report

Static analysis result for SHA-256 d432a0a7e9b52bc6…

MALICIOUS

PDF

60.4 KB Created: 2020-12-03 13:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: d14b2bf64bd7b1e5c2dac59c69eb0b92 SHA-1: f6bdf3e136f7aa730a0f2e6e9d0f2866f02a31ea SHA-256: d432a0a7e9b52bc69e49804bd1434f06903815be5d7264a55a00b39f43d75889
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The presence of numerous links suggests an attempt to lure users to external sites, potentially for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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.
  • 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=mimi%2527s+nails+hours In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388614/normal_5fb4dc7454c09.pdfIn PDF document text
    • https://fixivure.weebly.com/uploads/1/3/4/8/134888316/9365188.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/2a91ed66-5778-43b8-b182-eb318ceb2d22/toxefivifiwodimudodulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c763180-2d42-45e4-83a3-de804673d82c/85988934822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e00fff2-905c-457d-b34b-4030fa5ab6ac/13118048965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd9307d8-64da-4e22-b91b-6f9f81fa85fc/xowadufod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d7dd742-898e-4157-8712-cd4fb8f0446e/81243172146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13d44ce7-720c-4e78-bdf3-6fcd720252cc/alarm_clock_for_macbook_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e65268-5146-46fd-8e04-4b52b05fcafe/hriste_bo_c5_beer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9826ee7-a1a5-4eea-86b8-97dbdab3d4c1/96298188258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57117806-cdce-4f6d-b2bd-a7186fd0c13b/mrs_flowers_maya_angelou_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be81a3bf-8656-40ca-92a7-ecefc60aa925/jeruvomoruxun.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_off0000ae5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE5A 4964 bytes
SHA-256: c56aa249f1c721dde2a3e8d50d5db049126bd9200453bc93046cfc99b541023f
font_01_sfnt_off0000bf14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF14 12060 bytes
SHA-256: d1efb3937b0ce90cd52a1e1b1ee07247b71476ae27c1d9787476a83178ddb80f

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