Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d2edb597744dbbc…

MALICIOUS

PDF

77.3 KB Created: 2021-02-18 08:58:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fe00b95413f58958725298713d52d704 SHA-1: 236d8c8326bd279a9c7d06d10f440bfb229d827d SHA-256: 4d2edb597744dbbc164a9105adea41e9e5f06c3b349ef1a260d94e63e6745ae9
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URI heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://leonvi.ru/wix?keyword=timex+marathon+wr50m+manual+espa%25C3%25B1ol PDF link annotation
    • https://xomugewobi.weebly.com/uploads/1/3/0/8/130814749/48ff52fa6344b.pdfIn PDF document text
    • http://itasummer.fun/67823353322c80z3.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/jj290jh/roblox_studio_apk_tablet.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/idjgdii/13558664987.pdfIn PDF document text
    • https://cdn.sqhk.co/dikulodut/dukLVia/72749805164.pdfIn PDF document text
    • http://kawlites.online/tafuvixanyez4.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/KidLGqN/bubble_tea_popsicles.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/chjhejT/zesirogilareworobiduzigi.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/qhghfhf/jowugagon.pdfIn PDF document text
    • http://mon-cmso.best/protein_electrophoresisu6eaq.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/ckiQjeF/azamara_cruises_contact_number.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/hdmhfZv/matrixyl_synthe_6_serum_1_oz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pugatexekar.rf.gd/biveriwerirazuja.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/new_york_certificate_of_incorporation_form.pdfIn PDF document text
    • http://fewuzefar.rf.gd/new_r_b_albums_2019.pdfIn PDF document text
    • http://pewavifasovifuz.epizy.com/43103553003.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AC 5648 bytes
SHA-256: 036d190035400b711a7c4ce079f38bc1abffa20eeb2c3a13815e46ab55b1477d
font_01_sfnt_off0000ec85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC85 10220 bytes
SHA-256: eda3615e40aac3243f9706682c76f0ffc527a3cb84206bb6937aac0a6226bc2f
font_02_sfnt_off00010fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC0 16404 bytes
SHA-256: 9265572674f5d123027b0370a8409dbba55d2974e08c398d6fe2c058eb2ab046

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