Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b584081cc1de7c6…

MALICIOUS

PDF

83.1 KB Created: 2021-06-26 14:35:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d5b6eb175ea6652e75231240df404271 SHA-1: 502de4b4ab0dd3effd39984958c614eeb6d23ded SHA-256: 1b584081cc1de7c67bda5c70d8f9ecc78af00e769c59b4e6e4aec309138e5715
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/3c5e7f9426824f9ad37a284bb90d6f0b/movilid.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/cf9fde56a616a153c918d78f299c161a/94856084800.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/021347831e7f3a6f286caf52076f35f1/85710254863.pdf
    • http://wenxuezj.com/images/File/rirewovamikixevegilo.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/453ff5355dde14ac7bcbd10c6a74cbaf/27279742207.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ce92efc13---74032965962.pdf
    • http://www.kickcommerce.com/userfiles/file/jexajukesarafanefo.pdf
    • http://thedewakohchang.com/image/upload/File/9920389403.pdf
    • https://szallas-karpatalja.com/upload/podelizetoximakik.pdf
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/4708898550.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/fc601a3ac3ffe1f285ec32c9366bb3e8/xipazejupodimotijejazoked.pdf
    • https://pet-fashion.ro/mm/file/76809137649.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2bdddf197---lexabenanupijanoliwo.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607514609fde2---2950576747.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aae4f25d13b---pobofewavubeguviruleg.pdf
    • https://travelsafeway.com/userfiles/file/javiwuku.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/e2d2519643124d15af86baab53982dcd/buburilak.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/a28a6a5dcc99b21c5ac271fd8c3587a4/33368254405.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070fa3f55931---kitotutominutekipomomusi.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ac3f6220c---70318808680.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/b8bbbd1ed3ef77e7128609665f6b3d99/rekimajugomamajegobujitiw.pdf
    • http://hocikto.info/userfiles/file/74141910786.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/1ff2118e121204bec5f32d6a6da53c04/lixilunomofivip.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=pre+anaesthetic+check+up+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9b6.bin
981e1cbc93373d7ee197a133f4ccf79c97a4c006bda8cbfebc040a21b189111a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B6 17172 bytes
font_01_sfnt_off0000f63e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF63E 16792 bytes
font_02_sfnt_off00010e4f.bin
bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4F 16252 bytes
font_03_sfnt_off00012430.bin
e7f4c2d917127934b7a22c6f6ffeedb0edb7ddada07cd56813a9ef71d35193b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12430 10744 bytes