Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fc67c6ec535412…

MALICIOUS

PDF

71.8 KB Created: 2021-03-28 01:58:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f25ff3a42a131923bccbeb600ad044b4 SHA-1: d904cdc4639ce1c174b20d9bc630593c1f997bb4 SHA-256: c6fc67c6ec5354129d1f7bff7a1ce51ab208e6cbe8d66900f8655cfa63b61bad
196 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating it is likely a phishing or scam document. It contains numerous external links, many pointing to what appears to be an SEO link farm designed to redirect users to download sites, with one prominent redirector URL being https://nipisod.ru/strik?utm_term=football+manager+handheld+2014+psp+iso+download. The document body, though heavily obfuscated, contains references to software downloads, reinforcing the lure.

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://nipisod.ru/strik?utm_term=football+manager+handheld+2014+psp+iso+download PDF link annotation
    • http://vegofejolafud.mygamesonline.org/how_to_draw_for_beginners_step_by_step.pdfIn PDF document text
    • https://tofajoxoroj.weebly.com/uploads/1/3/1/6/131636991/keximixewetesam-fanibusovusepu-tofuxuv-zedajozove.pdfIn PDF document text
    • https://poxanopa.weebly.com/uploads/1/3/4/3/134380657/dazedefobubejob.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/7777458.pdfIn PDF document text
    • https://mimitokiwunas.weebly.com/uploads/1/3/4/0/134012498/zunetizonuzodir.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/nuxulikiwab/46802708897.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/41755596882.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/how_many_books_have_been_turned_into_movies.pdfIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_5e143331f8654f8b8f6aebeb48901581.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fixararololu/chrome_setup_exe_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/bohemian_rhapsody_sheet_music_alto_sax.pdfIn PDF document text
    • http://luregaw.onlinewebshop.net/xarilefozi.pdfIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_4cb1d3e5500848e1ae2af44f0f96d7ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suzujewa/adanga_maru_tamil_movie_tamilgun.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/23691869654.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_off0000d8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BB 5972 bytes
SHA-256: fcfb70812d2fcd7d38afe433de7258c3b685882bada86f076ae294e5323628b6
font_01_sfnt_off0000ecfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFA 10828 bytes
SHA-256: 2fde967302c6dc780f142789c408beffbe7b22bdf55cbc64fc13ddb683a194b6

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