Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ae2f0ec2f51ef2…

MALICIOUS

PDF

80.0 KB Created: 2021-09-07 06:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da30d64b960788f16e041a8388c4b1f5 SHA-1: 677a0847e2c8ca4ac45fc436671e0b568e048873 SHA-256: 96ae2f0ec2f51ef245b928a96ac71a69662dee2c44fe27e24257f982ea3fd7ba
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ede3eb64a6a---85180947875.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/b7a79558907e0c0fb49ad5a868fbe3ab/92928284443.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/651b4a99de9dfeef975f78e10f02a220/nakurozatiwosejutonubow.pdf
    • https://zionapostolicministries.org/uploads/file/buxove.pdf
    • http://soles2walk.cz/data/file/20614737877.pdf
    • http://noithattamphuong.com/upload/files/leroxoxipofuwubika.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790638c68c2---mudefuwutatedibuterak.pdf
    • https://sportsht.com/userfiles/file/jasuzuzufowodareku.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/d9e5c60890384ecb95eb830e1a84132a/rekaposulozigadekidu.pdf
    • http://hyosangjo.com/userfiles/file/20210803101049.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f174b4d959---jibezipezufuwotetuloni.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/e8m1h9llm83icik8a8mt56nvbe/xaneduxikaropeposevez.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3eaa9e839---14461172184.pdf
    • https://farmstead.tw/farmstead/upload/files/77116927149.pdf
    • http://edu-tur.ru/userfiles/file/vaxerudowi.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/4iidsltp3bl5vcf0k9f9maq376/26124697419.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608aea609053f---pevokugosimu.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/7fed749d69200d847d7dcadef1c32876/63594666341.pdf
    • http://igorodstore.ru/files/userfiles/files/gevokevu.pdf
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/95064203649.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160854f59ce8ad---11013097196.pdf
    • http://cn-daomeng.com/upload/userfiles/files/a17adfdf330512d9e84aee9534a77f31.pdf
    • http://smartraoptics.com/fck_filemanager_upload/file/84744183910.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f8af27f98---makudutufuza.pdf
    • http://amsaneeraus.fi/userfiles/files/kazisiwopexibiwadimafa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=torchio+manuale+per+uva+usato+palermo
    • 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_off0000d4bb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BB 16792 bytes
font_01_sfnt_off0000eccd.bin
c821753efc35520d6e53c93f43c977b0e140d130b80129e1cebf1f29fe3406b9
pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 16764 bytes
font_02_sfnt_off0001182d.bin
f3dc40f6fffb0b5a2e4d087446b926d8abf4f8aedc5ea2e2508416445c361ad9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1182D 10768 bytes