Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf21ad1e6f897a30…

MALICIOUS

PDF

76.4 KB Created: 2021-04-07 00:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e285907e430d1360aa36d864c0462521 SHA-1: 1ced95b34dc36f8345d9a00fa545b50438558f75 SHA-256: bf21ad1e6f897a3063fd9315549dfb791c619d0eab777d5413e67e964215fdcb
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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
  • 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://leonvi.ru/wix?keyword=kick+the+buddy+forever+mod+apk+revdl PDF link annotation
    • http://mestorating.ru/the_lottery_comprehension_questions_answers68zps.pdfIn PDF document text
    • http://temivenoni.iblogger.org/mbam_malwarebytes_anti-_malware_free.pdfIn PDF document text
    • http://zelafagilu.iblogger.org/zurefo.pdfIn PDF document text
    • https://cdn.sqhk.co/fapewejav/efhehjs/ridagorega.pdfIn PDF document text
    • http://kinoogf.space/crashing_hbo_season_1_trailer3x4tc.pdfIn PDF document text
    • https://cdn.sqhk.co/xaloridinef/jjRdS1x/sezovutukoripi.pdfIn PDF document text
    • http://opros.xyz/83676923716t9v7.pdfIn PDF document text
    • http://vekvelo.ru/water_ridge_faucet_costco_model_numbervlkr5.pdfIn PDF document text
    • http://songkfrk.site/41502988478m77wk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468571/normal_60545d1b87635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451545/normal_6061e70cbc5b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/675a7234-60bd-4149-9dfd-83d7fd04f446/how_to_setup_hp_officejet_6700_premium_wireless.pdfIn PDF document text
    • http://parakotevetit.epizy.com/wevaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94bd2ff2-72f2-4097-af43-8e262b842068/what_age_is_the_garmin_vivofit_jr_3_for.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/in_between_the_sheets_lyrics_rolling_stones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37cfe50e-5087-40c4-82a0-9487be109fe3/how_do_i_update_my_garmin_vivoactive_3_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/cartoon_videos_free_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/whats_another_word_for_remove.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/vodaluwita.pdfIn PDF document text
    • http://bisubop.epizy.com/pefivulug.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/2019_honda_accord_lx_android_auto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3b05a70-fc3f-47b8-8a5d-ad27ed143e8e/what_is_a_brownie_elf.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7F 5552 bytes
SHA-256: 94c7a8417e39fd3eb00e2223d951d92b1190b02ba9e12bac500c4fc1db5a331f
font_01_sfnt_off0000fe42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE42 11208 bytes
SHA-256: 0be3bed5be6bfaac29eba3f59aabcf9110de4df95a0a8ce057a9a11128143041

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