Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd8e19e075565a8…

MALICIOUS

PDF

81.2 KB Created: 2021-09-22 11:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0737050290ff448235b157a0e726a21a SHA-1: 570c92bcaa7fb1836628bc439870c269be3f8dbd SHA-256: 2cd8e19e075565a8a26790b6aa32ddaf59bbf178779ad6b41b8f6541399a7418
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript and numerous external URIs, including one pointing to a link farm. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates a phishing attempt related to lotteries or prizes, designed to trick users into paying fees for non-existent winnings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=how+to+hack+android+phone+by+sending+a+link+free+download
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/bunelazafejafomuvu.pdf
    • http://www.depomatrial.com/file/60361017074.pdf
    • https://orig-shop-gsm.ro/ckfinder/userfiles/files/15788345848.pdf
    • http://oticonshop.net/ckfinder/userfiles/files/xitopawuv.pdf
    • http://yuhenganquan.com/userfiles/file/20210911191616_1616028007.pdf
    • http://slsnn.ru/content/files/pugofanonatoterab.pdf
    • http://skncn.com/u/files/pawimu.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/f01bd7d0305bf7edbbb281058123286a/bobarob.pdf
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/gutasepabofijozujimabar.pdf
    • https://interstudy.net/userfiles/file/85722450298.pdf
    • https://nucamsa.es/userfiles/files/21426724506.pdf
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/71828284514.pdf
    • http://abnicum.ru/files/file/67377367443.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f80510d5e7---rojeriguvipeda.pdf
    • http://reclameindex.nl/images/uploads/91630456512.pdf
    • http://everbeenmagnet.com/js/upfiles/files/89001116756.pdf
    • http://easytravel63.ru/ckfinder/userfiles/files/midoxox.pdf
    • http://dailythang.com/userfiles/files/31300257792.pdf
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/votabuxegasipoxurolubew.pdf
    • http://aranykoronakft.hu/userfiles/file/71562977671.pdf
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13557353321.pdf
    • http://goldenpeak.it/userfiles/files/kajomugisorosejetusu.pdf
    • http://mehmetrasimmutlu.com/icerik/file/61648514630.pdf
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/77727403548.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d892.bin
2173286a6d45db877c32e1404d481c4804ac5a4768303abef38fe1f7b5147b3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD892 16952 bytes
font_01_sfnt_off00010425.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10425 16792 bytes
font_02_sfnt_off00011c3c.bin
d580641853629914d1ec452450c8ce53d89dfb2aa7e9343c1a13df81e8b98994		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C3C 11324 bytes

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