Malicious PDF — malware analysis report

Static analysis result for SHA-256 340361e450f13553…

MALICIOUS

PDF

83.9 KB Created: 2021-08-13 09:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d010e95d46d9796ea43d2023f5ce975a SHA-1: d3a92658af6496f1229f845be90d016e49c08ad5 SHA-256: 340361e450f1355301c5d7b7b5da55c6f52797479b036162a482029e78146697
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ataru.site/js/ckfinder/userfiles/files/53032774804.pdf
    • http://obrienbuilders.com/userfiles/file/89865927002.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160de27b6da2c5---82144174975.pdf
    • http://asja-doll.ru/userfiles/file/2715949353.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/5dbd263cbe2d213eb6df4c4b3a256710/xexenamodifonifitovom.pdf
    • http://www.klimavill.com//data/editorfile/mezebinovawalanuti.pdf
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/zoxulexivanijuraxuzu.pdf
    • https://magerp.org/upload/files/petebuloxaro.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b7807c472---98398497608.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/s8bla46vgmrgtjj2p4jfj60nvb/jewodapodoxu.pdf
    • http://leebyunghun.org/new/upload/board/files/gitofomav.pdf
    • http://fine-cottage.ru/userfiles/files/33491320469.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/9b7fe3772b5e3ed368ad98dbc9736c1e/gijokariziwixesunubo.pdf
    • http://www.look4job.gr/images/_user_na/file/52271961303.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f48608ab8---dowupisete.pdf
    • http://cesishotel.lv/res/wysiwyg/file/gavivarakepireniruvarif.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/g92gvnt0p4u8ke71rjavnsdd80/98080301.pdf
    • https://senfina.top/uploads/files/42099777180.pdf
    • https://tl-systems.hu/files/files/nagopu.pdf
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/32387295584.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/166b99a3ed4bdeae12ef2e92b975af89/fuvobegovosagovi.pdf
    • http://akgwealthplanner.com/crm/files/78810624317.pdf
    • https://www.carrentchiengmai.com/files/52728484018.pdf
    • http://fxmeat.com/upload/file/29c9cef39275c19e63eb770a9a8fb156.pdf
    • http://studiotecnicobonoli.com/userfiles/files/48222965388.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=sembaruthi+serial+bgm+music+download+mp3
    • 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_off0000e23e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE23E 16792 bytes
font_01_sfnt_off0000fa50.bin
3be3b0a0e6c2b4926c241be191873a058f72dcce56ad7fa57a5576c065d1f855
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA50 16852 bytes
font_02_sfnt_off0001263d.bin
d6c4be26cb6265963d47a91697427d1a59f106d4c40cb833a6a534041aad6fe8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1263D 11536 bytes