Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccdc1d68ae481142…

MALICIOUS

PDF

90.0 KB Created: 2021-07-15 10:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6ba4ae8b85cc3441f24659b8fff7a60d SHA-1: b7922d4b7fffe877b01b234dcfdf1a1afdc86fcb SHA-256: ccdc1d68ae481142b5e4d42fdda255f9164756216bba872f8733007b71b9233e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous links to other PDF files hosted on various websites, some of which appear to be compromised. The primary purpose seems to be redirecting users to potentially malicious content, likely for phishing or malware delivery, aligning with the Spearphishing Attachment technique. No scripts were extracted, but the structure suggests it's designed to lure users into clicking through to external, untrusted resources.

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://ajwatravel.com/wheelmarine/userfiles/file/3294757620.pdf In PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/63335430064.pdfIn PDF document text
    • http://elmaryapi.com/ckfinder/userfiles/files/buzabewori.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/fugiverepojimaj.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5733e6d200---31119746762.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/00bd1ce08271ba9ea947c799579103c9/taruxudijabegegadefuxife.pdfIn PDF document text
    • http://vetranhtuong.info/luutru/files/bavez.pdfIn PDF document text
    • https://minhkygroup.com/luutru/files/mijugepikifegalafujig.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fukumase.pdfIn PDF document text
    • http://cmrivestimenti.com/userfiles/files/62498908992.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160be5ea781d60---39639379407.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rozajutisapod.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607956e8d7e5b---61152466053.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/30789788034.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c65d206db---nagibetigifavolaxuvepes.pdfIn PDF document text
    • http://paglialonga.it/userfiles/files/jusokuzo.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/3epav05ihjhlnegnes3k7gtnmb/walivebamumezazuneked.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/jokagaseram.pdfIn PDF document text
    • http://toastwarenhuis.nl/app/webroot/files/userfiles/files/moxagodutafirisakeneroweb.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/tejukipewutesexeta.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/bc3d08d22345b27e98d3ac1220d8be35/xatuzewepodifofunemuke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=jim+carrey+doing+time+on+maple+drivePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD25 10860 bytes
SHA-256: 94034536cff9063e024c83aa24dabcd1de262c856ba6765cffd3bd8489f8cdb4
font_01_sfnt_off00011606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11606 17244 bytes
SHA-256: de35d48b12f8a52efd279eff7287070c4ebf3793a0b11973ffa7e14e7acb7481
font_02_sfnt_off000142e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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