Malicious PDF — malware analysis report

Static analysis result for SHA-256 086aedfce5f9f059…

MALICIOUS

PDF

86.1 KB Created: 2021-06-28 14:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 465e8409dce546c3d29a06c7f6684c8e SHA-1: 52c0f575bd9a8117d4304cb4834508dab7c815a6 SHA-256: 086aedfce5f9f059ee00108a776fbf48bba2b9859abaebfe2637585e675b4d61
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a specific ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous links pointing to various websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://palaciodelosnavas.com/userfiles/file/52783491019.pdf
    • http://rjt1.org/upload/files/ligukovimamumareso.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160abdbf5cac68---71547096403.pdf
    • http://a-mega.ua/images/uploads/file/fubetudawifi.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/42519b84f37677b0e08ee2d07f4289ed/kurigoluwojaza.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbbfe60228---16037205725.pdf
    • http://cokhibaosang.com/media/ftp/file/gaxomekorupetulit.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160b637deacbc3---68281849693.pdf
    • http://28777886.com/Lpf/UPFILE/userfiles/files/70091244940.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609dac6fbf2e9---59371732945.pdf
    • https://sport-jicin.cz/dokumenty/mivozekexetamokip.pdf
    • https://nbtele.com/en/cache/fck_files/file/56213392124.pdf
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/89852203b8e2d6af214d2ea0d7e6c211/wipegemamozez.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a610aa56f71---95563700622.pdf
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/fumavasilaxamarikezurak.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160778aed39c73---18063859864.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9f5a4c831---70401719403.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160881bb7b33b9---26793322539.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/76dc1b01b2fde68e0b2df0d2c44af57f/64562154354.pdf
    • http://akkoryazilim.com/userfiles/file/pagix.pdf
    • https://steklo-shik.ru/userfiles/file/nuvuje.pdf
    • http://aaaexpressheating.com/userfiles/file/63096117087.pdf
    • https://silga.ca/userfiles/file/wivolinexomedopasa.pdf
    • http://bloomx.com/sites/all/sites/bloomx.com/files/posuroril.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2837a90c5b---mazuzijosiwosasowew.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=axon+in+neural+network
    • 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_off0000ec73.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC73 16792 bytes
font_01_sfnt_off0001048a.bin
33f48cab82b50f02662c159c269aa8754b78b2c060919eb0b3651c9a7e676652
pdf-font-stream PDF embedded font (sfnt) at offset 0x1048A 10292 bytes
font_02_sfnt_off00011be5.bin
631ecabb2935722ac5ba27e0b335c8bf89641a7eeb9e73ca2bbc22ade31544af
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE5 17852 bytes