Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eaa74eccb3f3218…

MALICIOUS

PDF

89.9 KB Created: 2021-07-13 22:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 49d82069601e3ac14119a416b47874b3 SHA-1: 847496a9b9d3657a809669fc6aa0b72d82d25498 SHA-256: 8eaa74eccb3f32189b654a69c14dbc2a0194d1c494f24a94f249af67ef0834a0
156 Risk Score

Malware Insights

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

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, containing numerous URLs that point to potentially compromised websites or disposable hosting. The primary purpose appears to be redirecting users to external content, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://twr1115.net/files/fckeditor/file/21871113247.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/0kvr8tgrvmnlnu4l3a8mqb2goq/8451572083.pdf
    • https://circolodelpistone.ch/userfiles/file/kesuxobuwazilisukirojewa.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/a37g6uohsj06pa22h8s03o65vj/9806854931.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/03rdboav06sfvv335pm879q9vg/68356984522.pdf
    • http://lamexmarket.com/uploads/files/xonomazigegiti.pdf
    • https://studiopros.com/userfiles/file/
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/a03e22b2c84f865a1c32dee2a8d4a478/wukasojo.pdf
    • http://bioterapiazabiegi.pl/obrazy/file/xamuvuzomojom.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a488ff4505d---befubopikisosodaf.pdf
    • http://svsteinfurth.de/radsportfiles/file/sinomas.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48c1063dd1---jikefuvolaf.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e02ece926---turexalaniratuvadago.pdf
    • http://bpabv.nl/uploadfiles/file/44902663286.pdf
    • http://accronline.com/userfiles/file/tobudabiwe.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607337896ced9---wisokagizodezewofovufide.pdf
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210621_1D4834163AE60137.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609725117e0c3---kodikozoto.pdf
    • https://acrgroup.nl/userfiles/file/66971733213.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079c9fe3ce4f---54824466521.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/5u5tslupt347a7cni4emjvlcvs/69827931191.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b066f8a2480---11139180930.pdf
    • http://beachfirebrands.com/userfiles/file/tutafonevi.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/hkrbm9o99eml7nj7kepnbgll1j/vadesuwuvupej.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=kelly+mcgonigal+how+to+make+stress+your+friend
    • 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_off0000f786.bin
4010ec9ae57169459dad5590fefa4bedfc99f872fbaac40526f16b4235dab507
pdf-font-stream PDF embedded font (sfnt) at offset 0xF786 11308 bytes
font_01_sfnt_off000111c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x111C8 16792 bytes
font_02_sfnt_off000129da.bin
5774763bbd77618d9eb86504c7469dab07b0f4ea03f4ea9876809a075121b022
pdf-font-stream PDF embedded font (sfnt) at offset 0x129DA 17760 bytes