Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad2747a0e121d48d…

MALICIOUS

PDF

86.3 KB Created: 2021-06-27 01:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7db9d94175a966cb41a7ab8e0b283c3f SHA-1: 7a23d75f4cad23c19cc07dd92927d26620966323 SHA-256: ad2747a0e121d48da359e6c929bbeebca04862a5d476fe14e8a40c45048fdce8
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

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://huntic.ru/uplcv?utm_term=ethical+hacking+and+penetration+testing+guide+by+rafay+baloch+pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/6525908f8206836d52dddf3b1005040c/daxoxudo.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/656907b5dce063a58e88063a4598cbe0/110278466.pdf
    • http://ateliergermain.net/sites/default/files/file/61078816839.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2746f097b---mumodo.pdf
    • http://bularz-auto.pl/images/userfiles/file/82621714397.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/1ee43fa5f4ad6580b2e17ea85ca91f34/63914891371.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072e9a66f495---27957373725.pdf
    • http://piqiso.ru/userfiles/file/pafugebowosera.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/7670cdbb43e5bedef19e922b296e6db2/gibupupodono.pdf
    • https://hoakhanh.vn/uploads/image/files/sijufefajajaxajepopotoma.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/06j6o3pm8lfrf325mup2o2d9jh/revisuzi.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/ppmgfc1l2hm65pgjri88ar8uju/pusokokisixubekuzinamukad.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/6f08250ee31fad9195daf05705d9c6a7/zovukefevub.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160a25e111b95c---gegejabapikim.pdf
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/3d60f0f9379bcc8ab7529a6549a94219/ludeguditawowurabowifali.pdf
    • http://zulassungsservice4you.de/bilder/file/jegunowivu.pdf
    • https://caribemed.com/userfiles/file/48979291872.pdf
    • http://perfekttorun.pl/pliki/45658477420.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c33e3ea005b---98772500914.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f56d2225ef---2849687288.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1814a7e5bf---96481341169.pdf
    • https://partnyor.az/userfiles/file/62948124885.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607032c4503d3---basogorujejiwufoxu.pdf
    • http://55pluscommunityspecialist.com/userfiles/files/dijudijafumimanamorise.pdf
    • 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_off0000ed46.bin
56cd64e2d521e15f801d107482099ddbfb2506a7680a962c05cbd30cb2dece39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED46 11328 bytes
font_01_sfnt_off0001077b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1077B 16792 bytes
font_02_sfnt_off00011f8d.bin
f69206e5bafc6f4245d5140acb2cecc638f349cc6f9559108e6e9f1a29d27d47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8D 16884 bytes

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