Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e97491fddf21448…

MALICIOUS

PDF

71.2 KB Created: 2021-02-15 19:32:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7c4c5973eedc7f50318130e6da9ee8da SHA-1: a53b515ec1ae0c5a7deecd7ecee45d9d42aa38d7 SHA-256: 4e97491fddf21448c6dbb60f8b81fa78ed76d828089e13b301806a195e730adc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient to infer a malicious attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://jottigo.ru/123?utm_term=persepolis+book+review+essay PDF link annotation
    • https://cdn.sqhk.co/lopumilekana/2MsOmLJ/hotwire_last_minute_hotel_car_rental.pdfIn PDF document text
    • http://carins.info/4772316748m8usg.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/4FmrhaA/99229115473.pdfIn PDF document text
    • https://vikisoxez.weebly.com/uploads/1/3/4/7/134712259/4072088.pdfIn PDF document text
    • https://roviselazadavuw.weebly.com/uploads/1/3/4/0/134040559/d346ad.pdfIn PDF document text
    • http://drnextact.xyz/body_systems_graphic_organizer_answer_keywxhur.pdfIn PDF document text
    • http://vvinorama.fun/5953073281413tzd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426085/normal_5fe77b2f0210a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393521/normal_5ff7ee0ace442.pdfIn PDF document text
    • http://hotloveme.online/fegewakw1vxr.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/nademopor/69030650786.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/vikiso.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_off0000db01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB01 5272 bytes
SHA-256: 0bd184647ee9714e8294e506284509d60c94c8060156e4c1c866bb93ff15e780
font_01_sfnt_off0000ed10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED10 10364 bytes
SHA-256: 6613b69da98847db81ae3b11a72e9a9673677aa04ab488ec544daa2d4501cd35

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