Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0b6cc2ef600f47…

MALICIOUS

PDF

85.5 KB Created: 2021-06-29 21:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 454d5716ca0da38a008dad9d3c5093a2 SHA-1: 140b19a3208c63cc9bae6b8d0397bef9a62530ab SHA-256: 8e0b6cc2ef600f47d7c5efc053667f4ed4b2495993b7d2a038e7f4dd0b809a0c
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised websites, likely to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple links on disposable hosting and compromised CMS uploads reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811d5a42671---66977487997.pdf
    • http://gramercy-grand.ru/files/file/29981435465.pdf
    • http://novussiteyonetimi.com/uploads/file/valizi.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/719ec8b810168aaf100c072a665bbb66/mumis.pdf
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/xiwavuxijuzipugedovu.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608979d0aadf8---fitunon.pdf
    • http://brandiassociati.it/userfiles/file/15749223132.pdf
    • http://ferramentabelleggia.it/public/file/lupafegusomedavamiv.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/19fc80295c0a202ba11a0b7298e29e92/pewulujatuxadoguxum.pdf
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/43414907873.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/xezesuzegasesofasisevex.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bc74a4c3830---tixebevenagifixem.pdf
    • https://art-lamps-rali.eu/files/file/38860014225.pdf
    • https://led7.ru/file/75368515858.pdf
    • http://agnieszkapawlik.com/userfiles/file/59623163873.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b4c8d2583---13722337686.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160756cc653001---68059902231.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/00fbca480f58ba9461b3486ae5fd92bc/34177117055.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/4856d09958f9ddd3a6e971b24227f882/91154901635.pdf
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/xapagaliv.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/c90edb89c2a6fd9101fecf824f15d613/wonorotogivaruniv.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5eb43903d---51262648172.pdf
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/kiniweti.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=ulysses+and+diomedes
    • 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_off0000e949.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE949 16792 bytes
font_01_sfnt_off00010160.bin
f74f0c5aa09add46817738d81e043cc69028b93c51dbd7cb80af294a1dbd846e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10160 10332 bytes
font_02_sfnt_off0001189a.bin
66ad43375b6c6e559d802a750a541dc70251f0775803492cac553a15f7087ed7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1189A 19072 bytes