Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de5192deae92df9…

MALICIOUS

PDF

90.2 KB Created: 2021-08-09 07:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2d3191d85caf2d10e436b5264af17b02 SHA-1: f6abc1947a0c6322f59b66959b1b6d39c576e0e3 SHA-256: 7de5192deae92df96eb4e131b95ddcd35f49c090eda0e35e39639633628c6f08
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, forming a link farm. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://ketchas.ru/uplcv?utm_term=quem+me+fez+uma+princesa+manga+online
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9bb8d1e3e---8230326216.pdf
    • http://simonhoirup.dk/userfiles/file/dozigebufumeravewozami.pdf
    • http://aotwresort.org/ckfinder/userfiles/files/28435974361.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/7dd377db5d59bf108ce1b091d298b3f5/59297910665.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a02caf06725---biritotawimogilavu.pdf
    • http://bowlingkillers.com/imgdb/files/poforububiwirut.pdf
    • http://ty-universe.com/image/files/20210603_183122.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/k93v92fh4hpn8nq4nuj54lqkf8/bugimetefaga.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f288ebc88---80875338126.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713beb32351---2428258464.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/58dce09ece6e6a9888b93eed38429b5d/68244493244.pdf
    • http://alfavit.tv/userfiles/file/gapemabonona.pdf
    • https://sbmhavacilik.com/userfiles/file/zojuwiniwapokipi.pdf
    • http://automsystem.com/UploadFile/file/20210802163657254.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607498cbc84c2---79321514683.pdf
    • http://burelomdo.com/ckfinder/userfiles/files/72841500544.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bf205824cd2---68423136044.pdf
    • https://dewalt-naradi.cz/media/upload/editor/file/dojijune.pdf
    • https://machnhaduong.com/images/uploads/files/57455153278.pdf
    • http://ttccid.com/userfiles/file/moxejufilojotoxalusowo.pdf
    • https://topclassgreenery.nl/images/file/84187793794.pdf
    • http://daiichihr.com/uploads/news_file/jelobiv.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160825561d3a48---10684077893.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d830.bin
0d8ab7fcd4d4f6d3ad69f832bd0d8d993692125b5181de4729fae80bb6526d14
pdf-font-stream PDF embedded font (sfnt) at offset 0xD830 18308 bytes
font_01_sfnt_off000105eb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x105EB 16792 bytes
font_02_sfnt_off00011dfc.bin
6eb162b33eb88f8db5296bdd2517b8e3d9015a108d8cb0c1e5d83c65b2485e3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFC 16284 bytes
font_03_sfnt_off000133b7.bin
95845a4f0bb676e6cb128e8bc63a034993f3d7745d16dc7628d47a5acec84eaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x133B7 2564 bytes
font_04_sfnt_off00013ebf.bin
aae364b3927163e307d8e27a403e2276472bc4b3feacaa8ace1714189d94062e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13EBF 10944 bytes