Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc3416176853bdc…

MALICIOUS

PDF

74.7 KB Created: 2021-03-20 20:24:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 722cc6a9f07272f6ef93b3572dc64224 SHA-1: 9906245531e36e40e2b60ba47f90f4ef7c0d687f SHA-256: cfc3416176853bdce056643b3535038b68cd47ac80587701d16dfafbe3ccb318
156 Risk Score

Malware Insights

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

The PDF contains a link farm and an embedded URI pointing to a suspicious domain, indicating a phishing or malicious content delivery attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests the document's primary purpose is to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=why+is+my+dvd+player+not+working+on+windows+10
    • https://static.s123-cdn-static.com/uploads/4374542/normal_6002d8d8a2403.pdf
    • http://dagoseguvidita.22web.org/80403444164.pdf
    • https://livaganomin.weebly.com/uploads/1/3/4/3/134399079/fupasiniwok_rujewome.pdf
    • https://static.s123-cdn-static.com/uploads/4487187/normal_5ff862af427ec.pdf
    • https://cdn.sqhk.co/kikolibub/WpjjIij/top_ten_topics_of_2020.pdf
    • https://cdn.sqhk.co/fexilejedit/jc3ghgh/vebirexubosigavapuvevi.pdf
    • https://xudidetopos.weebly.com/uploads/1/3/4/5/134579215/dejoner_joxakiwup_nubezeka_fezilawepapola.pdf
    • https://lidaleteso.weebly.com/uploads/1/3/4/0/134017218/e06e9.pdf
    • https://cdn.sqhk.co/puvubuzu/hgfjjia/7314498361.pdf
    • https://cdn.sqhk.co/waxubisolo/khaNhcK/wawusemapuj.pdf
    • https://cdn.sqhk.co/satidaruxami/8giOMgf/f1_mobile_racing_mod_apk_download_android_1.pdf
    • https://cdn.sqhk.co/ramawuvade/jjialHR/sajebetota.pdf
    • https://xozilozevaloda.weebly.com/uploads/1/3/5/3/135391373/4562540.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://43466d02-873c-4564-b63c-f2f79aa6d38e.filesusr.com/ugd/fd64e8_36b1f122bbc2468c8c79efa5c1d9fd54.pdf?index=true
    • http://puwagof.rf.gd/64570231884.pdf
    • http://bakotege.rf.gd/tafegopedo.pdf
    • http://wegazoveg.rf.gd/hong_kong_subway_map.pdf
    • http://totakes.rf.gd/34815622534.pdf
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_2d39278d6be44d46b1bb9c6c94a79a20.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d2.bin
d08ccfeb16685679a8475d03a35d9c042e8608b9c0d6530cf49f5486f3f6c82c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D2 5896 bytes
font_01_sfnt_off0000f8e2.bin
2e62022e9be839322df27f4f6bd4118cb564669f72254d0b207f875dabc9a7aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E2 10752 bytes

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