Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd553b3f1593193…

MALICIOUS

PDF

79.5 KB Created: 2021-03-21 07:34:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c5b8fbc5a065f241f651070f4a7e6c53 SHA-1: a7057b1174b358acdbe85266df6b7cf0ad013f3e SHA-256: cdd553b3f15931932e5436c9cad3af30e08da453db236f6532828cfa442860a7
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains keywords related to 'Circle K application pdf', suggesting a phishing or scam lure. The embedded URLs point to disposable hosting and link farms, commonly used to distribute malware or host phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://druttle.ru/award?keyword=circle+k+application+pdf PDF link annotation
    • http://beremoter.online/redasosssr8.pdfIn PDF document text
    • http://excschool.ru/patricia_king_booksza0bw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382974/normal_5fc74a725d658.pdfIn PDF document text
    • https://cdn.sqhk.co/duwewofowus/RP1FAtk/pixel_force_2._4._4_mod_apk.pdfIn PDF document text
    • https://jotovaxawunujej.weebly.com/uploads/1/3/1/8/131856347/wevivimafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496378/normal_5fdbecb99e199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486359/normal_60481e931ca75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376602/normal_5ff38cd440ad5.pdfIn PDF document text
    • https://romagazep.weebly.com/uploads/1/3/4/7/134759296/nuruxonilowigej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_60458f2d90563.pdfIn PDF document text
    • http://thepropheticapp.com/modern_accountancy_by_hanif_and_mukherjee_volume_1jweou.pdfIn PDF document text
    • https://cdn.sqhk.co/kigoxeni/hanr1jb/prison_break_season_6_release_date.pdfIn PDF document text
    • http://omshop.space/where_is_chicken_soup_for_the_soul_dog_foodmo10k.pdfIn PDF document text
    • https://faxilazow.weebly.com/uploads/1/3/4/7/134725206/1230299.pdfIn PDF document text
    • https://jarowezib.weebly.com/uploads/1/3/0/8/130813985/7105138.pdfIn PDF document text
    • https://cdn.sqhk.co/kefexunas/D7iahYD/rowulumivutitumevirub.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/retobifulipo/converse_plataforma_blancas_baratas.pdfIn PDF document text
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_44b83dcc4ff14345a37231b0ae87fc24.pdf?index=trueIn PDF document text
    • https://3f3b26af-a357-4ab7-b723-baa2d0f6bb2b.filesusr.com/ugd/5d6e2e_1f4e79344c32480fb46f02854b276f41.pdf?index=trueIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_a9d34723396d4d21a6a7ac7de3fa8bec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/doxifuba/58081633797.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/ppt_puzzle_pieces_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/samsung_galaxy_s10_android_10_update_date.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/73154590640.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B3 4940 bytes
SHA-256: 92f9bbf7271536060a7c6e1813b16f05bd7ca819a4517ea395e1ae2dea74ccc2
font_01_sfnt_off00010992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10992 11500 bytes
SHA-256: f387080cefb813ede0b21177c63a09b6c4d1b8eea751b0609db4e434b245da67

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