Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e96ace127eda1e8…

MALICIOUS

PDF

63.6 KB Created: 2021-02-24 07:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2b57930808ddf306d8bb54f58232e845 SHA-1: 7090509b85a74c15cd61c21c50f4a9e62c3c0405 SHA-256: 2e96ace127eda1e85754ce50eb9750f076d81386ef0ded6416db4182997a57ca
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with many pointing to disposable domains and link farms, indicating a phishing or SEO spamming attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://seumenha.ru/wix?keyword=crossfire+zp+hack+2020 PDF link annotation
    • https://cdn.sqhk.co/wojusipi/jcjjZhf/gunuzarerukuk.pdfIn PDF document text
    • https://jixejuterekafiw.weebly.com/uploads/1/3/4/5/134508928/mojiledugaxikum-poxezuto-lasenovot-wemezexuluz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452846/normal_600547d938997.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/yieh2Vg/dunkin_donuts_gift_card_deals.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483842/normal_601dbc7e4bac8.pdfIn PDF document text
    • http://nutristrike-shop.ru/coliforms_in_raw_milkv3n4l.pdfIn PDF document text
    • https://favurujovonelod.weebly.com/uploads/1/3/4/4/134435517/5122005.pdfIn PDF document text
    • https://cdn.sqhk.co/wogirujut/gigd7eW/pumif.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/vgjhfUD/68485410499.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/6770233.pdfIn PDF document text
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/tameju-pibozinexok-sefogosoroxa-nagipajixuzejax.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/ratixifo/pwc_numerical_reasoning_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/cargo_manifest_format.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/70306419456.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/clozapine_blood_monitoring_guidelines_uk.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_off0000bead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEAD 5364 bytes
SHA-256: f251d623105469a3c67323bca9348e3c8e506ac20d446d235cb293cfdc557af7
font_01_sfnt_off0000d0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E9 9672 bytes
SHA-256: 133e3e39e6a73a448bcf36fc8320cb6c04b393a841d8c550abce7193d1814e27

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