Malicious PDF — malware analysis report

Static analysis result for SHA-256 0edec6e062c24538…

MALICIOUS

PDF

90.5 KB Created: 2021-06-25 19:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 679ae0cec7ee689bebfaad920ff17d97 SHA-1: b4b8215660209a6719b75391b1a64bf1880c0537 SHA-256: 0edec6e062c24538a01136f92636b5cfbb012f62109376df93e3797c43c629ef
156 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous URLs pointing to compromised CMS uploads, likely to host further malicious content or facilitate phishing. The PDF itself contains obfuscated data rather than readable content, reinforcing its role as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/f6cb18bcbb424fc8dbe048333d476a13/84974053618.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3993b7720---32343342260.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/pn3iqvugp403mq2huojo3ffuf6/56923282110.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767977665e4---4531550384.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/efabedfa897dbe638ec0ffc5922a7dff/napokataniwekonuxawaz.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/714ab6aa2eacc82529ad458ac667c5c1/45192135364.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9d66e094---nopafoja.pdf
    • https://binarbaidtrading.com/public_html/userfiles/file/54745743597.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/2j7ds2ti72sigc5ne7uugom4l3/tunoginonibe.pdf
    • http://aclamerica.com/customers/CMS-IMAGES/file/zavofetupuxuvimowubir.pdf
    • http://regimhotelierbucuresti.com/images/userfiles/xoduzofumagorafinur.pdf
    • https://cgeminfos.ma/upload/file/72611189130.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/cvmjjrv811tjnv3aucpp462t61/zuratupekafanasurufo.pdf
    • http://stalmost.pl/userfiles/file/netelubogez.pdf
    • http://poorclarescork.ie/images/72359778190.pdf
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/d11f315c94098fc2d4a22ebd4f02c9cf/5055978871.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/a139e66c56091444f65fd585abec235d/88945738539.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1ff92f3d8---81684627448.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbebc800d7---44027089153.pdf
    • http://amoy-art.com/Upload/file/nakokosumadifi.pdf
    • http://vitanova-cattery.com/upload/file/parunotesakelufa.pdf
    • https://klcmekatronik.com/ckfinder/userfiles/files/26067906797.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ad6b55bfcb2c80f507d53aa6df95e61/57774091417.pdf
    • http://nhsclassof77.com/clients/c/ca/caa0b9827732345dad94809623212052/File/61101108126.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=funnel+ppt+template+free+download
    • 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_off0000fec9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC9 16792 bytes
font_01_sfnt_off000116e0.bin
4aa529a55b1e92f9d9c1683beb770730a0d6d94c22045147a655ff322cffb138
pdf-font-stream PDF embedded font (sfnt) at offset 0x116E0 10564 bytes
font_02_sfnt_off00012ef6.bin
b2d983629c8f170af17189c5cb4b5cba3c10e231fe0732e1fbeeecbe8431ff0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF6 17480 bytes