Malicious PDF — malware analysis report

Static analysis result for SHA-256 debd0b333e903fed…

MALICIOUS

PDF

109.7 KB Created: 2021-08-03 21:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ebb3d2ee5d92680c1cc3267fd807bb6a SHA-1: d8369b908a426298caac365ba95c4352a4584917 SHA-256: debd0b333e903fed6c4e2c9f12ca542feee84e1fd951361cb81e8a2f12273520
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting, likely to distribute malware or phish for information. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

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 http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/6134876245.pdf In PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b68c63e459d---83335828490.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/bubizinibejojeb.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084e309dce9d---xitodetadizupagosu.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/79567831567.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1608064d7a979d---76754384712.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b097440a9---71123749380.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/1mh0dhggmoli2s2ntcd5s34d9m/noteforakusuj.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/kuzikozovopafax.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160862168cf632---37190992411.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/mitagawa.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39b72b0716---98690537438.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f61ec0208d---57293463112.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/e86a70d0fc951546216ed094b15d29b1/93373793852.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6ebacf618---4372209819.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a7965190f---68681949569.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb1ef13035---guzekukonazomapima.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/tekanafokewovon.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/91006874139.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/617956409.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/nilunotutej.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c4aaa2556---mawesa.pdfIn PDF document text
    • https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/budowawozuxefudonitidi.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/winavevupitijigipafikelu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=the+legend+of+zelda+four+swords+rom+ndsPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001135c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135C 17980 bytes
SHA-256: 40d2ba15659d0888fd0e65ecd307f52d3483a2dfdc67192c9bf9770b2961f6ff
font_01_sfnt_off00014a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A99 10820 bytes
SHA-256: 6c1bcc95d093e54c0ff203f1ab5894c108cf0bc1432d5ca8bce8b50443e982bf
font_02_sfnt_off00016343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16343 17256 bytes
SHA-256: afbc315c6f9377b9adf216b330809bcd4d62e70a3c338dea8dc59653d5c267d1
font_03_sfnt_off00019091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19091 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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