Malicious PDF — malware analysis report

Static analysis result for SHA-256 314a82286b005d53…

MALICIOUS

PDF

68.1 KB Created: 2021-03-10 23:34:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 512b2eefd9d450de95714fe8b962b0aa SHA-1: 9a5ba3a88ba82ca989bac609b24ad39858f3ca1c SHA-256: 314a82286b005d53aa945fc02bedd1250c6b3bbcecfa70cf353745a7033a26bf
134 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it's a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, suggests a lure related to scripts or invoices. The presence of numerous external URIs, many on disposable hosting, strongly suggests the document's primary purpose is to redirect the user to a malicious site to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://xezojetit.ru/123?utm_term=peter+pan+musical+script+pdf PDF link annotation
    • https://cdn.sqhk.co/linerutinew/iiigr2Y/actc_racing_2019.pdfIn PDF document text
    • http://kilewigi.iblogger.org/everything_that_remains_a_memoir_by_the_minimalists.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368951/normal_5ff09a11a5d6c.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/dGN0CQ2/write_japanese_alphabet_a_to_z.pdfIn PDF document text
    • https://sisebafob.weebly.com/uploads/1/3/0/7/130776599/guturomoriwotul.pdfIn PDF document text
    • http://katipef.medianewsonline.com/types_of_lower_limb_amputation.pdfIn PDF document text
    • https://bukowimulo.weebly.com/uploads/1/3/1/4/131407836/5694070.pdfIn PDF document text
    • https://cdn.sqhk.co/kepigofunet/dUggWij/custom_notification_ringtone_android.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/which_vacuum_cleaner_is_best_for_pet_hair.pdfIn PDF document text
    • https://pevamuwewewi.weebly.com/uploads/1/3/4/6/134636281/6000316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402711/normal_602221fc52bfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489052/normal_603707e468cb7.pdfIn PDF document text
    • http://foxinawolukomat.iblogger.org/carrom_3d_game_for_pc_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/48yVo7s/egg_wars_online.pdfIn PDF document text
    • https://woxomeze.weebly.com/uploads/1/3/4/4/134498023/7434813.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/ziwuvijevo/77195980656.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/70622378043.pdfIn PDF document text
    • http://zakivijojinikij.epizy.com/batman_hush_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/solid_phenolic_resin_sheet.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_off0000cd30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD30 5300 bytes
SHA-256: d818cd571997892f70b43010bd118b2cc603f501fe900e0511c5fb657dc62e0b
font_01_sfnt_off0000df1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1E 10484 bytes
SHA-256: d9d8b74b1e50ac755ed70f812a6896ab4b7602f8b7c120c46ea6d7fa0e0b9d0c

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