Malicious PDF — malware analysis report

Static analysis result for SHA-256 0501a96b2f22b8ce…

MALICIOUS

PDF

78.6 KB Created: 2021-06-30 21:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d2cedb9cde923214d0267bdea988e3c SHA-1: 1ffc2a5b56c186693cac9335a5afe7b6cbc36eb9 SHA-256: 0501a96b2f22b8cee58d0372f8af2fea78a5c0220d495f7149d254c150f3a3cf
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised WordPress installations. This structure is indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/1e19539b321a0aaa24fd19ea76d79d53/79623241913.pdf
    • https://synodradomski.pl/userfiles/file/xiwowovimaziwaxekiju.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9c9d481db---zobesajeg.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2b927862228410d2d5e6a7a65f42c917/88991738656.pdf
    • http://wmehoa.org/clients/d/df/dff1b85474dadb967ea0c40f6d5e37f8/File/72422934435.pdf
    • http://kosmonautika.ee/ckfinder/userfiles/files/16054473415.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609bbe2e94d28---10515672972.pdf
    • https://ahha.az/userfiles/file/zesuwozol.pdf
    • http://slenderclub.cz/ckfinder/userfiles/files/52304992040.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607af7bf69316---vawowinerem.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69f81262d2---fukinukeropivurudo.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d26c00c934---3099584423.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/2b221e66c93637ad8b9ce997df0c57fe/juxakudixamepizuxes.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca80bd29f3---18840486535.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/gdg933pln3nnih8u4fi68l6fe4/sefulebuliwesufufer.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad43e66f33---31202902698.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16071935ce94b6---seropopo.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8a479e8d4---8475221162.pdf
    • http://irths.com/upload_files/files/foxuwofodusogulalelira.pdf
    • https://open-call.fr/uploaded/files/linomozeloguxo.pdf
    • https://newtech-utm.pl/userfiles/file/biborewared.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/07fa553bba7c3c4732bc742123ffe0d5/24557722893.pdf
    • https://serka.com/serka/upload/files/goposasatoxux.pdf
    • https://al-farh-iq.com/upload/userfiles/file/dowogenexojaxanezode.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=ap+calculus+ab+limits+and+continuity
    • 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_off0000cfe3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE3 16792 bytes
font_01_sfnt_off0000e7fa.bin
a087c18ea4dd689840ee627b48a711ff9758467dc27f25351d1117078f6236dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FA 10776 bytes
font_02_sfnt_off0001009c.bin
47b7e0546da78233abeae794c07cf74f8fcc7a0a6803cc5ec563394133007ef5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1009C 17004 bytes