Malicious PDF — malware analysis report

Static analysis result for SHA-256 8611cc82e2dd2652…

MALICIOUS

PDF

72.6 KB Created: 2021-02-15 13:56:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 27e5fa9e9b78fe42634a270fe0cd5258 SHA-1: e9e3ac59b3d97ce87ba5d80e194550c092ba0ceb SHA-256: 8611cc82e2dd2652be6db108072004f766ff7dc8df58297bcfe31945407bb55c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to suspicious domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers also flagged this PDF as malicious, specifically a phishing trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/aws?utm_term=what+psychology+says+about+black+colour PDF link annotation
    • http://kimagibasip.22web.org/63769674680.pdfIn PDF document text
    • https://bojubuloxobepi.weebly.com/uploads/1/3/0/9/130969884/9c9978bdc6.pdfIn PDF document text
    • https://cdn.sqhk.co/xusovatovu/bspgggG/business_insider_careers.pdfIn PDF document text
    • http://nuzimodulinuke.iblogger.org/lusisavujuluzurorobegerek.pdfIn PDF document text
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/veneda-sesijorolodiwe-rujupekola-mariwok.pdfIn PDF document text
    • http://gonugotez.22web.org/app_china_apk_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pujinit/billions_episode_guide_wikipedia.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/descendants_2_free_mp4.pdfIn PDF document text
    • http://pewazeje.rf.gd/58960216671.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/kizijavogi.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/30132311001.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/wikibotimitovejarilasene.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/51056362263.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD520 5124 bytes
SHA-256: 2d59587b2de9398e977d2c4d7137ce47a203f42fe8f998127200f14fb1c33a56
font_01_sfnt_off0000e6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B0 9532 bytes
SHA-256: ce96819fe62408e8ac9380de91be9f733e450d25bbb132813751da2ea815bb91
font_02_sfnt_off0001074f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.