Malicious PDF — malware analysis report

Static analysis result for SHA-256 118c64e337a69b3f…

MALICIOUS

PDF

89.1 KB Created: 2021-07-05 01:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a7ccf7031ad963f0dc5448fa8d0ddc3 SHA-1: a3367a653e68e51514c6158308c168bd214012ec SHA-256: 118c64e337a69b3f453c7184033ca6f16fe7b673daf3da911e4db0bf16eb6704
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://allytemp.ru/uplcv?utm_term=queen+of+the+ring+drakorindo
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/22e73fcffd3a49ad3ae305e9c049a2ad/kederebotilesekuxamos.pdf
    • http://pmmagic.vn/userfiles/file/fewikonedolutidutedipotuv.pdf
    • http://staresecurity.com/userfiles/file/29883269167.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/03b97c0a7c8c0bd92e8a6c67ee972a58/lurubesirekinos.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8e5dcc736---lositapolapijok.pdf
    • https://aduanaldelvalle.com/userfiles/file/tifeje.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/89b9c16cc809959b9f603202299e256e/42704493979.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0859b1728b---wiwelonavebovenikopabu.pdf
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/45524080124.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/87d0dba8c90b479a7503a9b6470e1247/gemudar.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e565d8381---15599949503.pdf
    • http://b-solutions.net/userfiles/file/rokezulidugigilivuj.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085b3cc79afc---37647404328.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/f82cbb37349e129ae706104606e70f6f/62993946688.pdf
    • https://xanbiente.de/userfiles/file/minuwukupunafidulaned.pdf
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/xipabik.pdf
    • https://dm288.com/slicice/file/2094920431.pdf
    • http://phrabat.net/UserFiles/File/gimawusaxeworiwefupajudux.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff67215d7f---65288406787.pdf
    • http://dade666.com/userfiles/202106file/2021061721302170554.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/d45507de4e74abdd85508664620819f4/jinevusifug.pdf
    • https://actor-conseil.com/files/file/xajasinak.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/ff375cecc9023ba3364fe7da651f1033/67607486809.pdf
    • http://thuexe7cho.vn/upload/files/68778557336.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E3 16792 bytes
font_01_sfnt_off0000f8fa.bin
947544f34acb1e1bbfd85248aa5e73980e1520dadaa807378080a23838a38fe1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FA 10672 bytes
font_02_sfnt_off0001113f.bin
0c133022d1e9883d2ff7035cf84f1fa0be9cfa0d671266bc5a940283bc0f9855
pdf-font-stream PDF embedded font (sfnt) at offset 0x1113F 16376 bytes
font_03_sfnt_off00012763.bin
feaf6288867ace6f4833ac6ae697e2fb7443e81bae9cf24a343c8737830c185a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12763 17868 bytes