Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07614edd6002e3a…

MALICIOUS

PDF

91.1 KB Created: 2021-07-09 15:36:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8a8c3e47af675e7df56df29f0f686ab3 SHA-1: 2dd252f5d666e0c94080d1af6668bc99061e6f62 SHA-256: a07614edd6002e3a1f24d6f484bfd6db5e19e2ac52bb7eb39ea42332cbc7d3d6
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The primary purpose appears to be to lure users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://dolmalatrek.com/userfiles/file/23612655612.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb1c781840---kinesisigufaxisatut.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/29bbf0b9c8ade72344dc2125bfc38d8d/40391693034.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608695aaf1d21---juzomozusadojuwugeripos.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/16cqc2bosrvt4n0rd5p1av64r2/3800550355.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160db296acf049---32606679801.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/a5fad5198ed2788cc5a269754064e30b/dizisetogotuvezazafag.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160d350c992652---46327379820.pdf
    • http://beachhigh65.com/clients/879402/File/27684064416.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/v8fqib5gg0nl2jhk4namvojkpi/sadudagigirumutezez.pdf
    • http://hkbroadwin.com/userfiles/99473936065.pdf
    • http://tunglamgarden.com/images/fck/file/1819231554.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096671fd0df4---3369736797.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/b7c75c3e1c144d2897427671216444a7/78284795376.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608831398af15---vejuxokupilojisow.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/400e0f1b9e3b512dffbe33d049f04390/wimubafodazomejupagil.pdf
    • http://lab4050.com/upload/editor/file/jagegagetosurulenaral.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c945e80b2---godexaxidozibalanaxawonap.pdf
    • http://tantex.org/tantex/tantexuserfiles/file/fikagawifuwepo.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/9856698b104062bdbacd2c4e13f9e778/72929244900.pdf
    • http://energy-labels.com/userfiles/file/74783341134.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=is+it+good+to+eat+apples+in+the+morning
    • 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_off00010399.bin
e1e8f59d429e02d6f09cc0414ea728e6ea859b9a9987fdff5e0a8331650060c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10399 10788 bytes
font_01_sfnt_off00011bf6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF6 16792 bytes
font_02_sfnt_off00013408.bin
5fd97b8441285b59455f713a4fa8a087af131bc962c3e67bc45bf4995db8187c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13408 16712 bytes