Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b030b808ea2cea…

MALICIOUS

PDF

65.3 KB Created: 2020-12-22 04:48:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69c14d36f73dc64f79b90f8094a8c3ed SHA-1: ed309d3252b188a30a276f1e79afe518e223a3f1 SHA-256: 09b030b808ea2cea8897ef65f85a84c18e0b3f115e704f3a3e9b99b56994786c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing. One of the embedded URIs, 'https://trafffi.ru/123?utm_term=0033+the+customer+is+not+authorized', is directly associated with the malicious verdict. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/123?utm_term=0033+the+customer+is+not+authorized
    • https://norajaxufok.weebly.com/uploads/1/3/4/6/134611117/lopale.pdf
    • https://static.s123-cdn-static.com/uploads/4470982/normal_5fcaa1b62e553.pdf
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5f990de25ff34.pdf
    • https://losanuritajog.weebly.com/uploads/1/3/4/7/134730792/kigomubodu-damofivar.pdf
    • https://cdn-cms.f-static.net/uploads/4389084/normal_5fadb8429d829.pdf
    • https://cdn-cms.f-static.net/uploads/4392457/normal_5fc2c8ecf2fa8.pdf
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f8c4d2c4552b.pdf
    • https://cdn-cms.f-static.net/uploads/4426543/normal_5fa066c0e45ab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wejuvono/walazimovizupazalexe.pdf
    • https://s3.amazonaws.com/jopomodilamego/beach_buggy_racing_premium_apk_hack.pdf
    • https://uploads.strikinglycdn.com/files/4e1ecbd3-5e12-4bc8-a9c6-3ee2e7f16b5e/rcp_pipe_sizes_chart.pdf
    • https://s3.amazonaws.com/satuja/mewuzujebekelivir.pdf
    • https://uploads.strikinglycdn.com/files/d15b7d2f-f5a7-45e7-996e-3bfc0bbfab72/bisemazopakesisoxu.pdf
    • https://s3.amazonaws.com/fajeloninesitel/39175803951.pdf
    • https://s3.amazonaws.com/nodetuxapabara/nemolazenimaxaxa.pdf
    • https://uploads.strikinglycdn.com/files/d14ba03a-ced1-47de-8771-c33de64fc301/15180429158.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c075.bin
373b702d6401702013f7121cea366ab4c81a06ac55e3289f1439566e77f461e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xC075 5408 bytes
font_01_sfnt_off0000d2a7.bin
c3c6e4263eee0e650bb80b435ed1972f7a65698582d7d2f5a0f4e0553f64945e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A7 10944 bytes