Malicious PDF — malware analysis report

Static analysis result for SHA-256 08649b8e2088b9bd…

MALICIOUS

PDF

83.9 KB Created: 2021-05-07 05:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d37c899d23965881ecaf5f4ca187a9e8 SHA-1: f2af9f25756a48da782d04bfdb5c102427fc48bb SHA-256: 08649b8e2088b9bdf27f39f96a8a5e3d54720f078f35b79d42ff88c52d753484
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm designed to redirect users to potentially malicious sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL distribution strongly suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/strik?utm_term=casio+forester+watch+band+replacement PDF link annotation
    • https://cdn.sqhk.co/wojipezusax/bjdhdjc/tozikop.pdfIn PDF document text
    • https://rixodinek.weebly.com/uploads/1/3/5/3/135392020/wikimuxej.pdfIn PDF document text
    • https://zuvitapud.weebly.com/uploads/1/3/1/4/131406427/3762775.pdfIn PDF document text
    • https://welukixavise.weebly.com/uploads/1/3/1/0/131069839/kuwoxedipegade.pdfIn PDF document text
    • https://cdn.sqhk.co/dekavaka/ifghial/world_bowling_championship_2019_indonesia.pdfIn PDF document text
    • https://rekasefuwe.weebly.com/uploads/1/3/0/9/130969231/685a6cba05f80f5.pdfIn PDF document text
    • https://fiwarurebel.weebly.com/uploads/1/3/2/8/132814972/2049642.pdfIn PDF document text
    • http://bumululoru.mywebcommunity.org/reaction_paper_format_tagalog_example.pdfIn PDF document text
    • http://sutarakikim.scienceontheweb.net/kisufozepej.pdfIn PDF document text
    • http://wuvarijawogog.iblogger.org/zozapawonopeso.pdfIn PDF document text
    • https://bufodenoziro.weebly.com/uploads/1/3/4/5/134585066/5163816.pdfIn PDF document text
    • http://fenofojerafama.22web.org/test_for_functional_groups_in_organic_chemistry.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/linton_medical-surgical_nursing_7th_edition_study_guide_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/jjdiahi/27933658105.pdfIn PDF document text
    • https://midigoxu.weebly.com/uploads/1/3/4/0/134000126/zadilotoluwu-bexej-tinolob-pulok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pemebisifikase.rf.gd/tp-link_tl-wa850re_n300_universal_wifi_range_extender.pdfIn PDF document text
    • http://vopipewulowapa.rf.gd/47228609257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9edc15d1-7686-4568-bc27-5918fb2339ee/dell_optiplex_9020_small_form_factor_i7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a10a85da-b021-456a-b507-63ed02e527e4/solewuxilomazawukix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3971605-b26e-4953-88d7-49d837ede431/34421756515.pdfIn PDF document text
    • http://laragusezeji.rf.gd/carbon_nanotubes_journals.pdfIn PDF document text
    • http://nujilexulajuwup.atwebpages.com/ectomorph_workout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47c8ab76-9fdb-4c4a-86d5-354f55329d88/bafumunomelajuwip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed979eed-6100-47ca-90af-2701caad5c21/fomojuf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59C 5532 bytes
SHA-256: e6925375571992c66e7b8a2ef3176e1966c869c5abba6e9d406307720ad86ef7
font_01_sfnt_off0001084c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084C 10716 bytes
SHA-256: 51779ad098d9943c384686475f9f502ce4319c64f174d64571d16fb605d8ff70
font_02_sfnt_off00012cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFA 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90