Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2cf6dc448b8c94d…

MALICIOUS

PDF

86.7 KB Created: 2021-07-01 11:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 284e33be50e9d3b4897cf69576e2488c SHA-1: 2f4dcdd8f8537ab9d96034fc4075d1ed67f3dbf0 SHA-256: c2cf6dc448b8c94d7d6c84e719b8d9aeeedcf05cce9eaafd6b39341ebd3f286a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The presence of a URL related to 'free robux hack no verification' indicates a potential phishing or scam lure. No scripts were extracted, but the overall structure and URL distribution point towards a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093bb6d78afc---rujujonarunofitofenawaba.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/d075c82cfb2d32767df7b58469ecc9e1/15882253655.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/48fd40445c986f6754415d7ed37ed49c/lesujesegivosew.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/e7d92c2045a8c6c0aad8aa4aca19a654/10867591578.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/bff66476abe916382da4973932a0216b/1498668941.pdf
    • https://btcauction.vn/hinhanh/file/21404876840.pdf
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/95883713303.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e946ccf3b9---jabima.pdf
    • http://nhs1980alumni.com/clients/878257/File/44167112467.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609606336c3fd---naxibafaxesuzirus.pdf
    • http://whalesart.com/uploadfile/file///2021070105350188.pdf
    • http://1982thsreunion.com/clients/a/a8/a85c6617a93da1462bf6c3e7dda9c043/File/86244689194.pdf
    • https://nothingbutsafetyglasses.com/userfiles/file/82898873750.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/7qjkd9euapep6bf9amgkias3v6/remir.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/a16fd5e280ec7558a7a83b5f135899b7/8013538341.pdf
    • https://dacinsara.ro/fckfiles/file/38465425538.pdf
    • http://auto-spec.ca/fck/file/bonuvisud.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c03526667a9---xosubiwodode.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/6eac9fec776537fd49a2b41928e514fe/vufapajewebakobubib.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ef9f9a373---62634256799.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/2da6d0f9fe08ff103d81c180932b75d3/vivurejowisutonixidode.pdf
    • http://aire-limpio.com/img/editor/file/masijitezofipofifozu.pdf
    • http://langfordfinancialservices.com/userfiles/files/zogurikurofigexipa.pdf
    • http://bannermaul.com/userData/board/file/besulogunazenogisibarovuj.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+get+free+robux+hack+no+verification
    • 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_off0000eb97.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB97 16792 bytes
font_01_sfnt_off000103ae.bin
3b09cb52501f72cd3b6c0dc23decded7bf3ec28e8220e474b01ee49a1db593d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x103AE 10980 bytes
font_02_sfnt_off00011d33.bin
22714d623b91bd292af3ce0027681a2f62cb88847db93bf8dfcd6cdafd9b2fa7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D33 18276 bytes