Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c2caac4df561c0…

MALICIOUS

PDF

73.8 KB Created: 2021-02-19 08:47:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 246f611f7d7be7c9ed3f9b1adc023b62 SHA-1: 3c4ac2212d147226b6a02d2a19b0bf6bf8c8116f SHA-256: 77c2caac4df561c0989e571abd28733c9c4e4479d7c81508604ca6c28557f445
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://druttle.ru/wix?keyword=dayton+oregon+white+pages PDF link annotation
    • https://cdn.sqhk.co/tivinarafuvu/rZgigDy/super_stick_classic_golf_3_cheats.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/gipigi-jorafu-nazerizuni-libixavikeka.pdfIn PDF document text
    • http://rutonujak.iblogger.org/84873414182.pdfIn PDF document text
    • https://dukikabapesudux.weebly.com/uploads/1/3/4/1/134108868/livakodipebaw-fijagupa-dazabukafibok.pdfIn PDF document text
    • https://cdn.sqhk.co/lasijutag/ihyjija/vomerine_teeth_location.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/ighcfgj/22260222928.pdfIn PDF document text
    • https://nexiwurepefisov.weebly.com/uploads/1/3/4/3/134372078/kanebofiluwidugo.pdfIn PDF document text
    • http://bejavivamiji.22web.org/folesanozetorexotuvoraf.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/9gcibDk/lejamuxeluponojewite.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/welanisowari/greeting_card_templates_for_mac_pages.pdfIn PDF document text
    • http://bozudob.epizy.com/mawekib.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/bavafulipigijozuxiwogor.pdfIn PDF document text
    • http://diwedixeku.rf.gd/cyanogenmod_12._1_for_zuk_z1.pdfIn PDF document text
    • http://nogobixa.epizy.com/50755007408.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/semi_guided_elk_hunts_new_mexico.pdfIn PDF document text
    • http://toxiramagelovit.epizy.com/adobe_photoshop_cc_trial_direct.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/80159679727.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_off0000d8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F9 5244 bytes
SHA-256: 9ed3715b5bed1539954883f149317045f2ff6570bb4d9f531d04dd25cfd21d8d
font_01_sfnt_off0000eaeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEB 14432 bytes
SHA-256: 34e39e740f045cc68f8af501ae2bf19e6c0766198d9cd3cc849dd4aea3a50285

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