Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ab788073c1b464…

MALICIOUS

PDF

90.1 KB Created: 2021-03-16 08:14:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fb9eacbd0eca815a24ccb5b46a5e44b SHA-1: e212dad89a22f76fdc13f4511f6554d3a4654b53 SHA-256: 11ab788073c1b464644aeb1b9c3d382a085bb47fb061f5cc74027af4c069657c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to mimic search results. The primary external URI points to a URL that includes a search query, suggesting a phishing or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/award?keyword=candle+in+the+wind+piano+solo+pdf
    • https://cdn.sqhk.co/pemazekefise/doicUhd/likexiwukavokazidilexegu.pdf
    • https://cdn.sqhk.co/nofevemumidu/icGEkcV/kologilakoperema.pdf
    • http://luxuwum.mypressonline.com/35539024842.pdf
    • https://cdn.sqhk.co/xalurubizud/hbhiphe/kejoxilepetegudu.pdf
    • https://cdn.sqhk.co/nemalerute/heicgcL/advantages_of_social_media_platforms.pdf
    • https://cdn.sqhk.co/sadirorig/iidhdWq/46469033128.pdf
    • https://terojejiw.weebly.com/uploads/1/3/5/3/135348369/fibenin_najikufozakexib_tezivemupet_zarof.pdf
    • https://cdn.sqhk.co/xubupigegi/jahcjjo/extended_mathematics_for_cambridge_igcse_david_rayner.pdf
    • https://gawufuxawejax.weebly.com/uploads/1/3/1/8/131855981/metofatuza-dadevadomenuxub.pdf
    • https://cdn.sqhk.co/kubepugemaki/yhjgdjb/dungeon_crusher_soul_hunters_hack.pdf
    • https://cdn.sqhk.co/jenireni/gjegiii/phone_ringtones_download_free_mp3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vofadoloves/12726237241.pdf
    • https://s3.amazonaws.com/timituvupame/kingston_new_york_weather_report.pdf
    • http://vidilig.onlinewebshop.net/969140159.pdf
    • https://uploads.strikinglycdn.com/files/d68866ca-02af-4d50-9c51-71ee5be922a1/20179913809.pdf
    • http://bitenozof.atwebpages.com/45660050899.pdf
    • https://uploads.strikinglycdn.com/files/e77220c0-954d-4ce7-baca-93cdfac4ac65/zidevebitunamodaridegeros.pdf
    • https://s3.amazonaws.com/xazarujokemus/fly_sheet_purpose.pdf
    • https://s3.amazonaws.com/xasovewipeje/kitab_barzanji_dan_terjemahannya.pdf
    • http://bogalibamadom.myartsonline.com/what_another_word_for_younger_sister.pdf
    • https://uploads.strikinglycdn.com/files/101e5db7-2422-4efb-96ab-2e655b609f6d/skyrim_special_edition_change_mod_load_order.pdf
    • http://wilosokanik.myartsonline.com/catholic_social_teaching_human_dignity.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010cfc.bin
6abc7418a48f809386df28dbf6ed48cb745c15e268db1674d5f08b5bd70b8f0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFC 5028 bytes
font_01_sfnt_off00011e27.bin
7634bd2da541b74db7671e04e5cbc4eed52b220173fb52e462d129dea092cc79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E27 11468 bytes
font_02_sfnt_off00014514.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14514 16204 bytes

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