Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5398902afc7e40…

MALICIOUS

PDF

90.8 KB Created: 2021-06-28 15:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7909dbb522575b98cc159b974bb49101 SHA-1: 4f40ed36f1e3f75bd16d1d316819aec82faa227b SHA-256: 2c5398902afc7e4096346216fd5d1872973395fb340f89c7a712e6f71fc1c74b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file is identified as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. The document exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, or parcel deliveries. It contains numerous links to external PDF files hosted on compromised websites and disposable domains, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=find+my+phone+android
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/18ac40ac59caac1d9166050820814303/nanotugozezalolubem.pdf
    • https://churchofgodinjamaica.org/app/webroot/files/madojopogivisudadavu.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/smojppcl67i4vjo0662l10mrsr/zorekobamojidigika.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/b0aaa0025b103423516a5f542733581e/16001936391.pdf
    • https://alternativecarrepair.com/userfiles/file/82093346611.pdf
    • http://say-international.eu/userfiles/file/24525303427.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084f08b9c906---pejudemepivawavul.pdf
    • http://monroehighwildcats.com/clients/40160/File/kofulusekamipa.pdf
    • http://anhbanglaw.com/userfiles/file/nuxezisiwif.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/8fa0404ec319ace3c24004605ac6a24b/25300335311.pdf
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/ubkdtvrnmtg2acsfmb2nckoad3/90426093983.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/90f35a8f26bf2364819f724a87318dad/mawivabeveregawaji.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/59baa82b50271f805ee5369f9318b223/57413497890.pdf
    • http://www.deopendeur.org/imgUser/file/kisipaditisivezasowefi.pdf
    • http://andrelandberg.com/userfiles/file/39061486093.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c921c2eae34---81801233404.pdf
    • http://euro-ex.net/images/blog//file/tarisodifid.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/bu22h1mc7ltlr6c7di2lmfgf9u/mejexonojoxelitoxi.pdf
    • http://m2m2design.com/userfiles/26867458650.pdf
    • http://vidol.nl/userfiles/file/bopemu.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/hhogn7k0fm1kll5rmqhpjr3h2h/xalikoturuzaveduk.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cb38bdf2d---jexer.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160733b8ed5d4c---52800856892.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/xoxunasuvovovuranep.pdf
    • https://mvpartners.be/images/uploadedimages/file/bewepop.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_off000100fd.bin
ca2eb42cd4d4b2984c90ba6cd34e2b00265badf17ab0c419642691e3cc145aa2
pdf-font-stream PDF embedded font (sfnt) at offset 0x100FD 17428 bytes
font_01_sfnt_off00012ecc.bin
114dc1dc6aba46af39d76532db0ed96e011da69d4b4c57ead0bccde2223c0406
pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECC 10436 bytes
font_02_sfnt_off00014626.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14626 16792 bytes