Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa37100e3f2462d0…

MALICIOUS

PDF

84.8 KB Created: 2021-09-02 11:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3300a19e071ceb919d94d3281bc1a03b SHA-1: 0be2b99e3ec891e8feb8cf2d1d8a07a516d4ae9d SHA-256: aa37100e3f2462d0a3e4c2ae74994a8397efbeb2665474487665a53e1b5102d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, suggesting a phishing or credential harvesting campaign. The file's structure and embedded content indicate it is designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://catamma.ru/uplcv?utm_term=nwea+practice+test+pdf PDF link annotation
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/dbe1915072935fd4a023c87e89d8831d/filogurofelen.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/cdc6b06d10af81c80a1e3fac487a53e2/xiralasadiwuw.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbdbd4b703---ropanuwezigusudowa.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/0mvgelb3fs3pio70q6fpc03dr9/14148445212.pdfIn PDF document text
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/tebufanipaxaza.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-19/20210619051949883175.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611a6703eed1d---40257340713.pdfIn PDF document text
    • http://samurairamenbar.com/uploads/files/80266982719.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/1b2535af0ed617ba6b6fb56d82d58de2/poxepivajuwinuxuwipino.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/buvura.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/95153577827.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/lebipelopudolelurafa.pdfIn PDF document text
    • http://johnsonsdynastyincfamilyassociation.com/clients/10108/File/gikamemogirabigagigutum.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607143cd52a54---ziluna.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801c3f64500---talozaka.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/12628516095.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/dopovimoju.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bee214a054---65657636785.pdfIn PDF document text
    • http://hnspkjx.com/d/files/37602390257.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/856qfhlureokgt4iua4ppe0do2/72718179265.pdfIn PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/32515773145.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/952dc804c62869d48f8ffcc1ca391c67/zipotefakitenuloragav.pdfIn PDF document text
    • https://luathoanghuy.com/uploads/files/4355101391.pdfIn PDF document text
    • http://4yoga.by/pics/files/77929607364.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE704 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF16 18176 bytes
SHA-256: 66facbe2da5adcc1c688608fbc2a61b038bff529a08c004556c85df4cc3cae5f
font_02_sfnt_off00012dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCF 10408 bytes
SHA-256: 9236c6fa119152ee233920abc9606fdb750afb62629f2c4828ac7a80ffd37ab7

Open this report in the interactive analyzer, or submit your own file for analysis.