Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e6d6aec2cc714c…

MALICIOUS

PDF

85.8 KB Created: 2021-04-01 16:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4e0423f74cd2a5b27fe664fd8143feb6 SHA-1: e38821d115c528b719d51f8d0391efd61ab6d354 SHA-256: 49e6d6aec2cc714c569341896f6abf4da824c3de7d3fd6930997c910b6be9c37
164 Risk Score

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 0.9997

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 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.
  • 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://seumenha.ru/123?utm_term=graphic+design+basics+for+beginners+pdf PDF link annotation
    • https://vimefipivarek.weebly.com/uploads/1/3/4/3/134310944/c79a3dca.pdfIn PDF document text
    • http://dostafood.xyz/ravegazis1hrem.pdfIn PDF document text
    • https://werudugin.weebly.com/uploads/1/3/0/8/130873895/6863425.pdfIn PDF document text
    • https://munulibur.weebly.com/uploads/1/3/4/5/134508804/solafajalusin_miliduponin_xemop_sipimolop.pdfIn PDF document text
    • http://it50life.pro/54444991585a06pv.pdfIn PDF document text
    • https://pivamuwonojazop.weebly.com/uploads/1/3/0/9/130969183/9592055.pdfIn PDF document text
    • https://dolibaradodusop.weebly.com/uploads/1/3/4/5/134595809/sefakaw.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/8Vjg21h/kisexaluvinotofujoteko.pdfIn PDF document text
    • https://cdn.sqhk.co/ruradavi/hfjdNgd/mr_snappy_hungry_shark_evolution_gameplay.pdfIn PDF document text
    • http://xijogeziku.66ghz.com/what_do_we_mean_by_electronic_media_player.pdfIn PDF document text
    • http://beamorem.com/42973792163hnahd.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/zhe1BKl/24678637457.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/college_physics_openstaxu4gc3.pdfIn PDF document text
    • https://cdn.sqhk.co/pavuraxutem/jXuFKbm/lesley_build_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://danijikuguwidak.rf.gd/68377048017.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/fetizebu.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/sopep.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/jerefizimelopujesivepoje.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/sheets_pet_clinic_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/birthday_wishes_card_images.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_off00011296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11296 5556 bytes
SHA-256: 5425f0541e161e9f89871609087e6e1c62e224f707a93fbfc4c4ac98b9124b0d
font_01_sfnt_off00012571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12571 10600 bytes
SHA-256: 1f0d464fe1fa320a253402ae044759af9f38aaea6ae2b57a603467aee721fc56

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