Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0bf430abb7d4c56…

MALICIOUS

PDF

71.4 KB Created: 2021-02-19 12:43:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9c92b1e8ccd861fa2180abf7f671dfea SHA-1: 8a011157ffe464117cec8635bdcab2492ca376f2 SHA-256: f0bf430abb7d4c56af4609fa7a287126599a15ef5583b23f6a25ead5dc0e9eaf
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by heuristics as an external URI and an embedded URL. ClamAV and an ML classifier also flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to reference a product name, suggesting a lure to a malicious site for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jacksth.ru/strik?utm_term=nostalgia+electrics+retro+series+stirring+popcorn+maker+-+red PDF link annotation
    • http://mufawajidoxe.22web.org/bipasolukijakagumesosel.pdfIn PDF document text
    • https://cdn.sqhk.co/buxifuludo/icFgjgh/ragdoll_rage_heroes_arena_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lunemitibojo/aVibgiS/winking_owl_moscato_white_wine_750ml.pdfIn PDF document text
    • http://repochka.site/gotoluwigolowi6acbk.pdfIn PDF document text
    • https://cdn.sqhk.co/vedukosamo/jhgdVii/soccer_heads_tennis_2_player_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484609/normal_6020fd17c6a98.pdfIn PDF document text
    • http://reduslim-italia.website/fiche_technique_capiluveloye4.pdfIn PDF document text
    • http://alifan.store/rts_project_momentumf3rm8.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/ghxie18/capsaicin_benefits_chili_peppers.pdfIn PDF document text
    • http://bapexuwepurisig.22web.org/58493753265.pdfIn PDF document text
    • http://zurabutodiriwa.22web.org/diguwisuxenorowarizipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xituduriximujat.epizy.com/wegubexani.pdfIn PDF document text
    • http://sepuxukejobome.epizy.com/cambium_networks_epmp_force_180_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/valkyrie_profile_android_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/zunofiner.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/rexijawukuzegija.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/angry_birds_transformers_all_characters_names.pdfIn PDF document text
    • http://zuxekesimulir.epizy.com/another_day_without_your_smile_song.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD857 5456 bytes
SHA-256: 199b2e2e98099ee679b075533201cc11eacf02fd09296b1e212fc0f996d553d3
font_01_sfnt_off0000eadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADD 10748 bytes
SHA-256: c638dce0fd553c5744195276540c473a055cac9f3a656034067a9c22b31ca395

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