Malicious PDF — malware analysis report

Static analysis result for SHA-256 be79fa632e201e8c…

MALICIOUS

PDF

93.9 KB Created: 2021-06-26 03:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be647db5b33b05b36d3df3b6c72540e2 SHA-1: 467f1f412cd00e2dae0420713f87034c0994ed1b SHA-256: be79fa632e201e8ccd9f115a91ee053a732e3763b33ad84f65efde192126f7c8
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of multiple links to distinct, potentially compromised hosts indicates a broad phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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
  • 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://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/27c507t1ej6ere70mdan3r6n93/revoj.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16091edf2c39c7---pipubigomifakesiduvufoj.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16094aceaad0a6---18743979778.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/a8fgs1spm4pucrnv9umrmn1sus/17167382052.pdf
    • http://amandatravel.com/userfiles/file/mafuzekedotipenil.pdf
    • https://actaviaserica.org/board/file/files/3631924333.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/293762e7496ebc9dd162939c7330e71d/19967924591.pdf
    • http://caudafotografia.com/userfiles/files/pigifewavavugasubog.pdf
    • http://agcslohian.com/userfiles/file/nomeropidazapip.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ea24f29ab---luzijamezivezaju.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607abd2782cd6---43326056223.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba4c4cdc8e---88739455594.pdf
    • http://eksan-ltd.com/userfiles/file/bekenumolal.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/d1c74a678700e1a5d38e345ce675d4ad/ruvil.pdf
    • http://af.ssla.ru/images/fornews/files/nabenuben.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5abd35454c---27383932358.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160756fae17072---48335305913.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/2ef323bdf17d74994ccab84ca17b7f8a/dosabotosidi.pdf
    • https://ngoctraithaibinhduong.com/uploads/news_file/rumokenatulawoxadi.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cb842c958---nasaj.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/f2d6b69a1ab5430570b3cf753d7fc02a/dipoxuxuzupolapulila.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93da4d55d7---pimezawodurodofidabubano.pdf
    • https://slide-bearing.com/d/files/daletomiwu.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c58cacd423---35566770123.pdf
    • http://phonphangschool.com/upload/files/sedezupa.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/ffd5fb88c2f8878bd85f6aa5d45f4300/wanuramik.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=can+you+eat+wheat+germ+raw
    • 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_off00010e2b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2B 16792 bytes
font_01_sfnt_off0001263d.bin
b0e6982467e07e8de04b8810a40ad5b5d43db0da5e0c6e08b4f02ea0887ecfcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1263D 16872 bytes
font_02_sfnt_off00015217.bin
7c7f91276468d3b64cc2a119cb60318173465aa14c08a4b527fc3cce8899a971		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15217 10580 bytes

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