Malicious PDF — malware analysis report

Static analysis result for SHA-256 e19fdc0483d0f988…

MALICIOUS

PDF

78.0 KB Created: 2021-04-14 19:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcee9d493cc0624f10bc3129c6aedc38 SHA-1: 502f25f2c6add5013ebcf99ed412f9e148cce978 SHA-256: e19fdc0483d0f9882a7cfb223ced849552bef4b7fe16dfde051cdb90cc466c28
126 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing or malicious link distribution scheme, as indicated by the high number of external links and the ML classifier's strong positive prediction. The document's content, though partially obfuscated, suggests a lure related to a board game, which is a common tactic to disguise malicious intent. The presence of numerous links, including one pointing to 'jacksth.ru', indicates an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/strik?utm_term=the+shining+board+game+2+player
    • http://vijasoga.22web.org/sanyo_roku_tv_32_inch_review.pdf
    • http://hotita.space/47462295677co4oo.pdf
    • http://vaborogi.22web.org/86931688452.pdf
    • http://fc-aromat.ru/why_18th_century_is_called_age_of_reasonpx6lx.pdf
    • http://levantegroup.net/ancient_greek_olympics_boxing_factszm1bb.pdf
    • https://cdn.sqhk.co/bivosozos/oPsgdhg/balearia_palma_formentera_directo.pdf
    • https://cdn.sqhk.co/kigimole/jhdidgi/burger_shop_no_ads_apk.pdf
    • http://4338bacchus.com/what_is_a_legal_statement_calledvgz0i.pdf
    • http://zijiwox.iblogger.org/24122582558.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_e1c9b3d8df6a4a7f8eeb09c97fafd756.pdf?index=true
    • http://wizajevul.epizy.com/bigovizoka.pdf
    • http://rumajajoneder.rf.gd/icds_9_borrowing_cost.pdf
    • http://sifuxugod.epizy.com/55663281518.pdf
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_bf04f95854d14f549c2d80b9063853a4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0d5af80f-72af-4397-ae48-875b6f1515bd/can_samsung_s9_battery_be_replaced.pdf
    • https://uploads.strikinglycdn.com/files/4d1e8414-b121-4f34-b784-0a48193fbab4/how_does_evening_primrose_oil_induce_labor.pdf
    • http://zatojigetafugud.epizy.com/colors_worksheets_for_preschool.pdf
    • https://uploads.strikinglycdn.com/files/454ec61a-0ac3-4f4d-8ec9-25db51bfc968/how_long_to_smoke_a_12_lb_turkey_in_electric_smoker.pdf
    • http://fofebur.rf.gd/jixexepilusot.pdf
    • https://4dd4a32c-aced-41d2-87e6-7ff9ca8080d7.filesusr.com/ugd/6d6f33_27c856429cf7415fa0e38946835b6960.pdf?index=true
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_ba4d2ff0a3344ae6975a3263b95136b7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c0447986-2046-469a-9c1c-d654cee5d09f/kuvapapirixugudulapun.pdf
    • https://uploads.strikinglycdn.com/files/d8ef36e7-e116-4285-ab3e-b5cb5d01e13f/3999509626.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2c2.bin
8f91f747afd1698854d8fa72c0840d038b3ca3a166040522b971d5c303941224		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C2 5696 bytes
font_01_sfnt_off000105f7.bin
8071a167a343c8304cccc2712a1c23a82d6615c84eb413c21f5f5540a5dae195		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105F7 10704 bytes

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