Malicious PDF — malware analysis report

Static analysis result for SHA-256 12761674792da886…

MALICIOUS

PDF

78.6 KB Created: 2021-07-03 13:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7450f557377370236c7b104de041d258 SHA-1: 356b8f04c90eebf2e8a9682bb1284f9e6e6e9792 SHA-256: 12761674792da886433bcc2d2f2871e07e302603bd8a2e5e1f992bfe198e9433
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites that appear to be compromised WordPress installations hosting PDF files. This suggests a phishing or redirection campaign, aiming to lead users to malicious content or further stages of an attack. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/8v52isma99likcdmipa3ekaj7u/topofepigibipak.pdf
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/oijiarv88ind9d869admmdljjd/duvobuzeroxunor.pdf
    • https://emauto.lv/index/images/up/file/74055620209.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/661e2726c7ec61b4aa1ed09ded703487/soferetupakelubibebizuve.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607125d056596---53309325731.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/cc516ed791c9f2558ff5f663f9a15a7b/bikuxenurevitagumopo.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a25543d5189---tozipalab.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/v11c6e124r90u4puctuqf6ies7/92382958872.pdf
    • http://meble-tk.pl/userfiles/file/jizawodatawidepi.pdf
    • http://xlsferrosilicon.com/d/files/gokitemana.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d6fd26b0e---38569809693.pdf
    • http://myucmas.com/userfiles/file/22449687416.pdf
    • http://caopump.com/admin/userfiles/file/xodizutuguki.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/df6pigbauhtif5ta7f79lm0pp3/59565861427.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e216ce5a6---42257391497.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/nfq5rv1iiam54lvk6h9unif5it/47165068165.pdf
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/cf217e22fb383c236d7226c8305ecbf4/fexutide.pdf
    • https://aawyx.com/sites/default/imageuser/file/98347865847.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a461685c768---80731460203.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a63dc03594c---nurogizopozemokutu.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c77791df884---xafopi.pdf
    • https://skyzoan.com/cake/beta/userfiles/file/pezitisejuzegebekobid.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc8e257cf3---47177852142.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6905ed04fc---99332583877.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0b639bc4d---numigojotetaxo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=bradley+track+and+field
    • 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_off0000d0bb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BB 16792 bytes
font_01_sfnt_off0000e8cd.bin
b660a5891e56d9f981f7756c993de2dfe3134c2dd6325c12407bb3b45aa873fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CD 17144 bytes
font_02_sfnt_off000115aa.bin
2cf7c4b3d4a582f031a8f4a90f2b1b3a37de55683f3de508b4ef49fb690b3f43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115AA 10440 bytes

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