Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ce0d050a09dc1a…

MALICIOUS

PDF

84.3 KB Created: 2021-03-27 17:18:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3946247dbd0e4fc2fd37601b637c3e0e SHA-1: 03b2cffd4f122f4f8be895e43a23892ccb766f43 SHA-256: c2ce0d050a09dc1aa91bfcca05e0ab4c1947c5d1f7b833a354557faa27c8f76c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains a reference to 'Sherita dixon-cole apology', suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://jumiwimov.ru/wix?keyword=sherita+dixon-cole+apology PDF link annotation
    • http://psychologyrelax.xyz/office_chair_sketchup_warehouse8vjcp.pdfIn PDF document text
    • http://kind-insta.site/serararujoburasipuxuxizihs6y1.pdfIn PDF document text
    • http://workbykoder.xyz/ucsd_vis_41z2s3i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445866/normal_6035dc8f924b1.pdfIn PDF document text
    • http://masajsalonunuz.com/40431371800gudn1.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/39497813404070v3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481667/normal_60414cad8c03e.pdfIn PDF document text
    • http://kpovli.ru/3_carat_radiant_cut_diamond_with_haloym8ie.pdfIn PDF document text
    • http://cparta.moscow/guzop41c30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402252/normal_5fddda2e5eccd.pdfIn PDF document text
    • http://sellamorem.com/nonefibadejuru28lic.pdfIn PDF document text
    • http://nasty666.space/3d_puzzle_game_ipadlqwtn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408596/normal_600125373e790.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504568/normal_5fc831d2b406b.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/27078490727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408321/normal_602537718f3c8.pdfIn PDF document text
    • http://myfoxing.online/sodudawufudisesepenumatifci48c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xutenujute.myartsonline.com/what_meters_use_one_touch_ultra_blue_test_strips.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE683 5248 bytes
SHA-256: ed2be195745df55f9483cfdcd3b7c8abe84d37d842b8c55f558603dc8466f5e9
font_01_sfnt_off0000f85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85A 11268 bytes
SHA-256: beda2f8e71f4d412c973b1fcdc7fe24c7ff9f4f16a3f2c73c099b2b560c3b44e
font_02_sfnt_off00011f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F03 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_03_sfnt_off00013431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13431 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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