Malicious PDF — malware analysis report

Static analysis result for SHA-256 07fe15b5433ee46a…

MALICIOUS

PDF

82.3 KB Created: 2021-07-05 21:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dc9797c2717d30fb1ae2992e9b20cfc7 SHA-1: 13379253b90a6f722c86c697d02e1c86364292ec SHA-256: 07fe15b5433ee46aa3c52eb15dc4fd7f0acc7bdfffac2d5a5adc21ac3d024271
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm and a browser installation lure. The document's content, though heavily obfuscated, suggests a social engineering attempt to prompt the user to install a browser extension or update. This is a common tactic to facilitate credential theft or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c34b1b492cf---zukewebawogupurivelujipem.pdf
    • https://btegypt.com/file/ramemunokefodaxila.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/a212d1e60a744ce05876f81787d4cec5/74362912128.pdf
    • https://bednidhitraders.com/userfiles/file/31772778219.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc9ffbb23e---xigediwe.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160958e5dafdfe---30846135720.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0a6349a51---38427593331.pdf
    • http://mail-ex.net/userfiles/file/93285943310.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/253b2b1df787979b0377c4a64808ed5a/wikovi.pdf
    • http://sanarina-coaching.de/ckfinder/userfiles/files/84641401325.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608396931b737---14930001702.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/obq4afm997slm0ggnbo6nought/51435378210.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/2ef5e38a1d533a9145d1aa4d226a6c50/vizarobolaxofajopogilujag.pdf
    • http://s-privod.ru/userfiles/file/85652093274.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160804e7dc0bd6---65440306529.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1e52e4555---bobawaxetorikimurusum.pdf
    • https://zanhotel.ro/beficientconsultingFiles/file/30868805132.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16098cf4a46bb5---puweruniwawop.pdf
    • http://albino-pitti.com/pub_img/file/fipolijerapuvuleto.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/de8f51223cc04273590f63ada8cc00b5/jozunakudewidoso.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/kdn2qq7n6ndk84kvil6asm5e63/guwakukup.pdf
    • http://rheinmotel.com/userfiles/file/70495060687.pdf
    • http://vantaibactrungnam.vn/upload/files/gebivus.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=anglican+chant+psalter+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_off0000ddd8.bin
30deefc122c2bbcd4c33d5a76f60bfd4d4dadbb01e7a217b7eee1ffaa94be260
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD8 17452 bytes
font_01_sfnt_off00010b6e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6E 16792 bytes
font_02_sfnt_off00012385.bin
70b010f1e47cc53eba93809d618b13abd77bd28fa42ef459e4263f6a10d350e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12385 10760 bytes