Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad7a6c7576e0f4d…

MALICIOUS

PDF

79.3 KB Created: 2021-09-07 22:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6057dce57f29f047933ee402089aebc6 SHA-1: d14c84c2ae5a2dfdeaf6e7890e8da5b064e63299 SHA-256: 9ad7a6c7576e0f4d9daabcc3a3f702db3bbe7c44c3f30204c252814ec60abd69
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classification and ClamAV detection as a phishing trojan. It contains a link farm pointing to numerous URLs, some of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The primary attack pattern involves leveraging these links, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/37969346702.pdf
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86510439751.pdf
    • http://studiolorenzino.eu/userfiles/files/lumebapeta.pdf
    • http://ambulanceservice.pl/userfiles/file/rozijisalile.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/46ad84b180e73b392f408f4f250a8daa/polixugamozajaguwagula.pdf
    • http://usmleworkout.com/files/file/tufofinemasatawol.pdf
    • https://detskeihriska.eu/ckfinder/userfiles/files/4947031986.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6566de37cf---22935699764.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609598f32c19f---54214526309.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/5f160fca568837dbe1ad2b003d276171/xogozowimikefabipegi.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/86d0dc0a53c0d02f0840151b7628ec5b/nulepozufige.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac696eeb545---sodowerol.pdf
    • http://indcms.testingmachines.com/images/file/72780932499.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16093eb7e48c0e---koxenore.pdf
    • https://polaria.cz/images/file/37931104127.pdf
    • http://picassogift.com/Uploadfiles/files/sasuvazisifafugekut.pdf
    • http://www.corazondelsol.es/ckfinder/userfiles/files/16997852194.pdf
    • https://carlojans.com/cms/file/17341589381.pdf
    • http://thegioixedap.net/upload/files/tosuzesikopejukalav.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3d6d62af7---51694998069.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d6fe38499---69915557179.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/5f5a20a03ce7cbf34050c66c5a10e3a9/76036747603.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607bec08964b8---wikuwowobe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=calculus+1+purcell+pdf
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/bowezukekojodogatu.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_off0000d232.bin
f1531adfa490147705e5523759c69a052f7d92170508d55d5c201011aee9c3c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD232 10384 bytes
font_01_sfnt_off0000e9e1.bin
f0e442d096364e8fc3d70f292a842ff1be098e112d16f1e33bea7c66e4315e08
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E1 17036 bytes
font_02_sfnt_off000115ba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x115BA 16792 bytes