Malicious PDF — malware analysis report

Static analysis result for SHA-256 9485360c3aceb110…

MALICIOUS

PDF

77.2 KB Created: 2021-05-09 19:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8ceaee5404cd634533bce4ffd0a51769 SHA-1: dbbe40ab241a9b0473f4414e594a04748c67df5c SHA-256: 9485360c3aceb1100554ee3b807d26b15cb99cf1e448bff8ae045607792358b8
196 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 SEO-optimized PDF files, suggesting a link farm or phishing campaign. The primary URL, 'https://lozipotod.ru/strik?utm_term=google+chrome+adobe+flash+plugin+blocked', indicates a lure related to browser security, likely to trick users into downloading a malicious payload or providing credentials. The ML classifier and ClamAV detection strongly support its malicious nature.

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.
  • 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://lozipotod.ru/strik?utm_term=google+chrome+adobe+flash+plugin+blocked PDF link annotation
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/dupevepuk-viwitosopenaso-nodabazoneg.pdfIn PDF document text
    • https://cdn.sqhk.co/wejoladixuso/igjjYii/32739520192.pdfIn PDF document text
    • https://wudizabilizone.weebly.com/uploads/1/3/4/7/134745746/5691550.pdfIn PDF document text
    • https://cdn.sqhk.co/zidulibu/2UEhfii/gedoberaxozalaleniginof.pdfIn PDF document text
    • https://jaduxokapatusiw.weebly.com/uploads/1/3/5/3/135301375/b74b2ebfeecb.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/cwiiie8/foxatokutap.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/jethhlf/49640073572.pdfIn PDF document text
    • https://geripefuni.weebly.com/uploads/1/3/2/7/132740274/7a6043e5e176b0.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/NhhS05h/microgolfoven_aldi_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/g8jdJhi/riroguzufeserunixelud.pdfIn PDF document text
    • https://cdn.sqhk.co/xivijela/uJ4XgfG/attu_movie_rowdy_gana_song.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f0c10ca-af98-4a46-bd69-2ec395d34334/8298665093.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/rixanenupiru.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/71888094996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d346df5f-c14b-4e60-8287-b153945ef97a/how_to_connect_sony_mdr-zx220bt_to_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5697ed31-e8ea-4953-a38a-2e20c61a56f2/jovudexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78803d80-6156-45c2-949e-6b4426ee1ed6/download_film_the_maze_runner_1_sub_indo_480p.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_off0000eed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED4 5804 bytes
SHA-256: 8bbebb40962323b1380ca06c640653cf5cda3cc12bb78f552571cf0034d98bde
font_01_sfnt_off0001026c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026C 10864 bytes
SHA-256: 09fab8f303e94c8470177d73da57cc2db0bbb000699a622d4ecb4e0d04cbbd3a

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