Malicious PDF — malware analysis report

Static analysis result for SHA-256 e402e0087e41c580…

MALICIOUS

PDF

140.1 KB Created: 2021-08-14 15:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 27041f8ec370c658cd3a76980ea67257 SHA-1: ace68ee5c2595b7ac4fb44809bed9019c986d09d SHA-256: e402e0087e41c58005ff9659ab02c52bb45def76a4765ffae5a24a7d2586f557
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised websites. The primary attack pattern involves luring users to click these links, potentially leading them to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9678

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 http://salon-urody-bellis.pl/images/file/61701962190.pdf
    • http://nemeckystrakac.sk/editor_uploads/files/kiruvipadewod.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f87c9bc0c---xepazu.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/2hdmirtghl1ao4vqg9diiokah1/21678628302.pdf
    • http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/satuzitugelupidinojir.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/79a3e7c9115acd47249fca40d7209f79/12243953351.pdf
    • http://tomaszfilipczak.pl/userfiles/file/50641454476.pdf
    • http://krevue.cz/UserFiles/File/21527813047.pdf
    • http://suncitygroup.ir/basefile/suncitygroupir/files/vudoxewewebaziletixemuwup.pdf
    • http://scard.vn/app/webroot/uploads/files/4011246105.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/6im7f1jjvekm8fu3df4susl2qn/wagukuxibupelugosexur.pdf
    • http://abwsalisbury.com/uploads/files/65223621367.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608060a513b47---69976348351.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/67f324b0033a0307ce4e0a2917a82c7d/3196686943.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/eef3a089546257f1c2d57b8fb05a2800/bafivujajubo.pdf
    • https://vinacomvietnam.vn/uploads/news_file/17027705051.pdf
    • http://sanraimundo.cl/dyn/uploads/file/gezupozujexezugoju.pdf
    • http://wildpflanzen-planung.de/file/85521675474.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7cb178a8f---pemupoxotojerulapabofug.pdf
    • https://yaslibakicisi.net/userfiles/file/55033775091.pdf
    • https://groupburuemas1.com/contents//files/64385422499.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/503b7362f95846359daec88da7ef0de1/vutoxin.pdf
    • http://akkoryazilim.com/userfiles/file/domuvat.pdf
    • https://suprizpin.com/calisma2/files/uploads/35865675202.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=conics+project+examples
    • 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_off0001a15e.bin
730ff7c891e663a61262d88952825a9373f7cf65e060f6827b07a5417d3c8d3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A15E 20792 bytes
font_01_sfnt_off0001d8c0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D8C0 16792 bytes
font_02_sfnt_off0001f0d1.bin
7dd5fb61ea0ea1e3370d26720032e9d3de5740e898843eef2fe92164eee2597e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F0D1 16224 bytes
font_03_sfnt_off000206b0.bin
063e287a4611904f047cc19d2f4989baf300d777c1dde7a3e42e972da533351a
pdf-font-stream PDF embedded font (sfnt) at offset 0x206B0 10796 bytes