Malicious PDF — malware analysis report

Static analysis result for SHA-256 acefe8514aa0aa59…

MALICIOUS

PDF

69.8 KB Created: 2021-03-29 04:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fd8f3ed44f48f388768dc3e8c7a404d SHA-1: e4dcef5d4272573632b1efb75887cf3e5f05727c SHA-256: acefe8514aa0aa5908af968b988fc974c5a94efbeaa8d3b0ceb3932173d778f5
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 contains numerous external links, with one prominent URL pointing to a link farm on disposable hosting, suggesting a tactic to manipulate search engine results or distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/123?utm_term=conservation+of+momentum+worksheet+answers+chapter+8
    • https://cdn-cms.f-static.net/uploads/4405414/normal_6045f4800f7d0.pdf
    • http://bottlechainworld.com/european_football_championship_2020_scheduletls2h.pdf
    • http://cardioactiveitalia.site/51043606004ya0k8.pdf
    • http://xadixul.66ghz.com/brown_and_tan_mini_dachshund_puppies_for_sale_north_carolina.pdf
    • http://popubim.iblogger.org/sotibamutupukodu.pdf
    • https://static.s123-cdn-static.com/uploads/4380209/normal_5ff486a9bd1c2.pdf
    • http://esclub.info/life_hacks_how_to_reduce_stress59tn7.pdf
    • https://cdn-cms.f-static.net/uploads/4369936/normal_601f2a2f02346.pdf
    • https://cdn-cms.f-static.net/uploads/4387819/normal_601701221f96f.pdf
    • http://affilateapp.online/75362036255xrmge.pdf
    • http://sokolov.fun/clash_of_clans_hack_free_coc_gemsenv8q.pdf
    • http://onsideball.info/baba_bulaki_videobs27y.pdf
    • http://eglo.club/99170108912byh3n.pdf
    • http://tutafukasit.iblogger.org/zimalekotezun.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/waxegatulo/tolujutoraxiga.pdf
    • https://s3.amazonaws.com/fuwuzerijofa/monster_hunter_4_ultimate_insect_glaive_guide.pdf
    • https://s3.amazonaws.com/zagapaxa/vizio_sb3820-c6_firmware_update.pdf
    • http://muvegeposobaxog.rf.gd/novena_de_aguinaldos_para_nios_en_ingles.pdf
    • http://busugotuwege.epizy.com/most_fun_zodiac_sign_yahoo_answers.pdf
    • http://keporeninudo.rf.gd/chamberlain_whisper_drive_garage_door_opener_belt.pdf
    • 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_off0000d2b3.bin
fdd9c1e30ff70adc45bbb30c870ad7d492f69a863f1610da77e8990a4190e950		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B3 5536 bytes
font_01_sfnt_off0000e579.bin
4caf505174b8bbf25a7199676a649c4cb9f46d70339cb62e76c7265691199d92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE579 10048 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.