Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e083e390b3925d…

MALICIOUS

PDF

66.4 KB Created: 2020-11-11 16:20:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 36cde5b8815bf9ed16d6737b8cbf7154 SHA-1: 77d132e1736d999597220a6c24c1423922e40896 SHA-256: 04e083e390b3925ddad1bef1c7afceb7a02202c22604b38f0f035776d0cf5106
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains multiple external links, including one pointing to a redirector URL (`https://traffnew.ru/strik?utm_term=female+body+habitus+types`) which is indicative of phishing or SEO spam campaigns. The heuristic `PDF_SEO_LINK_FARM` further suggests a large number of outbound links, with one pointing to a Weebly hosted PDF. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffnew.ru/strik?utm_term=female+body+habitus+types PDF link annotation
    • https://sofowalomutupal.weebly.com/uploads/1/3/4/3/134310420/nobamewesa-buxuki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_5f8d2a4a60120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_5fa29cbe649f8.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/pibabopuduj/201-639-3690-4128_is_true.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fad6f5cc-fd5b-421e-8a2b-7b494fea8ca5/english_writing_skills_books.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/watch_the_rise_of_skywalker_online_free_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd8dcba-60a1-4832-9276-56b94e621f92/vasogukomegetifesaduwig.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/moulton_gun_club.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e690f34-0246-4632-8fb2-3cf2b10e2346/rivemazafefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bafb70da-e8c0-4f13-bd63-9c978411274f/36029126262.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/28288296457.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC60B 5300 bytes
SHA-256: dc87d2daad530f6623513cdf64c981d6ab0120376d30a5012712525e012b00bf
font_01_sfnt_off0000d7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E9 10928 bytes
SHA-256: 6f6f605f3d4d29e2f74e3d015e87cd5ce02bda1eded434bae879967a11b533bc

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