Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ec47335caa9914…

MALICIOUS

PDF

98.7 KB Created: 2021-03-22 15:02:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6ab307659ee0ffddd5351845c101a9f7 SHA-1: 20e46d0bd28fdd18aa289c2c0b37b6ffcf29be13 SHA-256: 93ec47335caa99147e90b42de87ba3839eecb37c51eff6de9d97dec91e9e742b
252 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and ML classifiers, and contains numerous links to external websites, including a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'white christmas ornament decorations' to entice users to click on these links. The presence of a 'download button' heuristic further supports the phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/aws?utm_term=white+christmas+ornament+decorations In PDF document text
    • http://skameyki.club/hide_navigation_bar_android_piepk9ee.pdfIn PDF document text
    • http://myshoes.moscow/denididubixaburepezoxoc9k.pdfIn PDF document text
    • http://llloooodddd.space/action_movie_trailer_templateheeo8.pdfIn PDF document text
    • http://pubgucbayim.com/668742089455oz1w.pdfIn PDF document text
    • http://gezekijoj.iblogger.org/9666737376.pdfIn PDF document text
    • http://ilook.market/405419950180j4sl.pdfIn PDF document text
    • http://mosdendy.store/36001272845nih9k.pdfIn PDF document text
    • http://claire-irk.ru/ohmeda_biliblanket_meter_ii_service_manualz1r7m.pdfIn PDF document text
    • http://reduslim-eu.site/transformers_forged_to_fight_tier_list_20195m2hv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_43bf12c5d7224c96a4be0b53c66ae454.pdf?index=trueIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_c067ad327b014734b5f928c01beb5a04.pdf?index=trueIn PDF document text
    • http://simipibenafar.epizy.com/lefazekufimalutobiz.pdfIn PDF document text
    • http://viminug.epizy.com/fountas_and_pinnell_guided_reading_lesson_plans.pdfIn PDF document text
    • http://tokegavewori.rf.gd/how_to_win_a_roulette.pdfIn PDF document text
    • http://dejosabo.epizy.com/48513678166.pdfIn PDF document text
    • http://rixadobi.rf.gd/10128186293.pdfIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_0c28f319279b4d0083a7a37805c53bf2.pdf?index=trueIn PDF document text
    • http://vasinazovuxe.rf.gd/bullet_raja_tamil_movie_tamilrockers.pdfIn PDF document text
    • http://sexikiti.epizy.com/isometric_exercise_examples.pdfIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_69feabf6fac94b6396bd204532339733.pdf?index=trueIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_54b530d9148a4eed831a401c99829ec7.pdf?index=trueIn PDF document text
    • https://6fc76513-a17a-4053-940d-bef108f5ea85.filesusr.com/ugd/3a5ef0_111a005d500942d4853681ee231bf657.pdf?index=trueIn PDF document text
    • https://82cb18f6-4a40-4824-ac11-10070f72ce02.filesusr.com/ugd/5aec95_9a2bd6aca83d4fbabc41c301383b80be.pdf?index=trueIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_68a3f0fe931947548a4ce93cdff3f3ff.pdf?index=trueIn PDF document text
    • http://gixarab.rf.gd/larasijuziwavisuvapuze.pdfIn PDF document text
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_e78fceb6e7334b3c8c3acd814bb52912.pdf?index=trueIn 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_off00014785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14785 5160 bytes
SHA-256: 859255356ccd4603cd9ff0682df9da8b81b6c5f55a9e70cd40ffcd96eb8bcf47
font_01_sfnt_off000158ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158EC 10492 bytes
SHA-256: e1b6913d61abdc86fbcdd96894e74e3ce24429a2cf6c81795d08585e82055921