Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ecb7d0ef39895e2…

MALICIOUS

PDF

70.0 KB Created: 2021-01-01 03:07:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 75ff9a4ccee63acfcf1a0ad70431f618 SHA-1: 81d5ba953796884a5a9291ee685959297d806651 SHA-256: 8ecb7d0ef39895e26045408b81f62558cfcc46d6ec7c992dd492231bbbcb55c4
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing attempt and a link farm, with a high ML classifier score and ClamAV detection. The embedded URL points to a suspicious domain, likely used to host malicious content or redirect to a phishing page. The document body, though heavily obfuscated, contains text related to a 'business intelligence manager description', suggesting a pretext for the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://traffset.ru/strik?utm_term=business+intelligence+manager+description PDF link annotation
    • https://cdn.sqhk.co/sixepatexup/2ifEnwd/diwemewukibuginejit.pdfIn PDF document text
    • https://cdn.sqhk.co/busosuwik/eYjijbi/gobilizizanu.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/jiivAWH/nostalgia_ultra_tracklist.pdfIn PDF document text
    • https://cdn.sqhk.co/nafumozuwe/UiaijIM/dokejofagebe.pdfIn PDF document text
    • https://puwikopigab.weebly.com/uploads/1/3/1/1/131163601/5d6e700b44ff0ed.pdfIn PDF document text
    • https://cdn.sqhk.co/jevipugirofi/dhfzjjR/mopusamebetanomeloja.pdfIn PDF document text
    • https://vazatevetag.weebly.com/uploads/1/3/0/8/130874289/burosufidowa.pdfIn PDF document text
    • https://venakadu.weebly.com/uploads/1/3/4/7/134729608/xanerugibawavud.pdfIn PDF document text
    • https://xonasuxodu.weebly.com/uploads/1/3/2/6/132681295/5694151.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/F69hgUF/27453065938.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/ihhdtid/gavokutuxovugizefolu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pafexegud/cyberghost_7_full.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/o_burlador_de_sevilla.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/topenugokejorusiluxofep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2e325f7-75c7-4f92-8095-76e4d3be1d6d/18904730230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0331cd07-37d1-4f46-b78f-1ef325245536/11680255415.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/wufutojanakuluwag.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_off0000d650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD650 5440 bytes
SHA-256: 3b67d1c0f5a0effcee9485416fa5f6c97090065583ed000ec16fe2ded58a74e7
font_01_sfnt_off0000e8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BE 10020 bytes
SHA-256: 85f3740385a1d45d725811e2ed5ac16fbd79d9d48f3d91389b571f58cb593e95

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