Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7a5c2be4c2b251…

MALICIOUS

PDF

85.7 KB Created: 2021-03-02 13:48:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 926fd868bd73c5845c60c49f5a5ee491 SHA-1: 424d0779b7812440e64ba7bfdea768129af8554d SHA-256: 2d7a5c2be4c2b251775d571bf156d4b5e1bce56e6bdbb1fcf5397738c643dc52
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious content. It contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The presence of 'utm_term' parameters suggests a phishing or SEO manipulation tactic. The document body, though heavily obfuscated, contains text related to search results and manuals, reinforcing the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=how+to+find+answers+in+google+classroom PDF link annotation
    • http://pofuxubilet.sportsontheweb.net/gifixesurowemuku.pdfIn PDF document text
    • https://kawuruli.weebly.com/uploads/1/3/0/8/130814241/9fe25dffe7f.pdfIn PDF document text
    • http://figuzunifowet.iblogger.org/john_deere_l110_ride_on_mower_manual.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/big_world_fix_packs.pdfIn PDF document text
    • https://lelebozo.weebly.com/uploads/1/3/4/5/134578107/jovite.pdfIn PDF document text
    • http://duwudivusupo.mygamesonline.org/the_office_uk_series_2_episode_1_script.pdfIn PDF document text
    • https://xufiridib.weebly.com/uploads/1/3/5/3/135346556/005636961be7.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/jio_mobile_video_calling_baat_karne_wala_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/zokasejiz/LRQhjgd/zombie_city_survival_hack_apk.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/54013484256.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/bihibib/supposed_to_do_or_suppose_to_do.pdfIn PDF document text
    • http://sofoviwov.iblogger.org/microlife_blood_pressure_monitor_replacement_parts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385020/normal_60071144ccb91.pdfIn PDF document text
    • https://cdn.sqhk.co/zisuxemop/5HTXiai/83086154764.pdfIn PDF document text
    • https://dukalafaziwemum.weebly.com/uploads/1/3/4/7/134772398/3860640.pdfIn PDF document text
    • http://kavademive.sportsontheweb.net/taurus_pt111_millennium_g2_9mm_pistol_review.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/how_to_confirm_interview_location.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duwemanuwixam.atwebpages.com/56338415554.pdfIn PDF document text
    • http://velefejaforafe.rf.gd/tuxazegonixazetaji.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_off0000fac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC2 5396 bytes
SHA-256: 6af42d6980ed104f1ed99472172c4d145b26c1ce88a73ff95751794163a734c9
font_01_sfnt_off00010d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D18 11776 bytes
SHA-256: 113047d178e31b035b40bf77f232519dac18986b630e3481b9a07ded0f6cdba1
font_02_sfnt_off0001346e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1346E 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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