Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e6477e3c37269d…

MALICIOUS

PDF

86.6 KB Created: 2021-06-26 02:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 162a7db954ed05dbd1475cf5db99b0cf SHA-1: 8bd4599a21da3bcd4c5a63e6973011408b6b11fd SHA-256: 47e6477e3c37269d8e70c3654e9e85b3efd95197d36b3805d03b0b521f41fe8c
156 Risk Score

Malware Insights

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

This PDF document functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure and embedded URLs suggest it is designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://allytemp.ru/uplcv?utm_term=bootstrap+about+us+page
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/418298d2bde73713d766532194023ff3/nimoxufemitorezevuzifupej.pdf
    • http://harasim.cz/uploaded/files/32739947780.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/9cbdc9cd61ef854176184002f73caf42/55761953196.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982848ac978---bipom.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/07b56981c894a49b1b172bd964d72a43/18128590026.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1abb871bb6---jinageneposorutud.pdf
    • http://shipsupply.ru/userfiles/files/55688591380.pdf
    • http://feach.ie/images/uploads/file/67436809687.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16075493c09869---22099159075.pdf
    • http://decom.pro/admin/ckfinder/userfiles/files/timufadifuluxewawusedeter.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/9e2ef743a903bcbfe67b5eb04a59aa12/94680809896.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c77a2c5ec50---fimibikokinakobog.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/148v38cf4hp4en2snedr5cgkm7/12698618231.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/n15ncg9llu464sfpv0cvbg9gc5/vedasukagolepabat.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac22eab061---dawenamozipizurax.pdf
    • http://nowyhotelik.pl/userfiles/file/2959099472.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/3b6536e558da397ff995225c9ea5c8fe/86898736315.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/99214c98368fe4a5f93532d2224ada7c/gopitobafemalipifoxox.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/10b776c443fb3e5075c26440c5c2e1c5/lafelorelebivunutevidozin.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d64fe16963e---xoxalisuvojopusaradibe.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072903572922---gelasupotebu.pdf
    • http://madveras.com/ckfinder/userfiles/files/481707113.pdf
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/82136640973.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cae20b341f---tuvejerezolarujebapuk.pdf
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/taligadevutanim.pdf
    • http://ahchala.com/img/file/xubase.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_off0000ef58.bin
a0b8b4900405e038f2a819c4d1d3f1b57f3aa249a4124a842b86fb4aa966fb71
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF58 17516 bytes
font_01_sfnt_off00011d2a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2A 16792 bytes
font_02_sfnt_off00013541.bin
a7f17ecbe8745240aca50ba7e4ad539cbcb18845c68529599cc56a230fffc0fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x13541 10476 bytes