Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e03891fb6e918f…

MALICIOUS

PDF

86.0 KB Created: 2021-07-09 00:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fcb56835826abc1999739a0d9a728a1f SHA-1: 4c41d44528bfa6792902a40dd7fee3e534ad6fe2 SHA-256: a7e03891fb6e918f0d63b37c84fcd9434e559db122be4e6ba4299845c47bb09d
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated and contains no readable text, but the heuristic firings and numerous URLs are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9638

Heuristics 5

  • 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
  • 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://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0272e57d3d---wevenumar.pdf In PDF document text
    • http://aligokdemir.com/resimler/files/51436108490.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fa9c81126---4327066530.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd01a2ef4c4---16047878851.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/1oqqfvc7d5mq447upb9k4jubvb/747266607.pdfIn PDF document text
    • http://babamoleskine.com/files/file/34327425269.pdfIn PDF document text
    • https://dm288.rs/slicice/file/xinabofofizuf.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/pinufinusunenizoxaruz.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/tebosiva.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/86689102166.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8ba008a3a---pigodegubawarepudetokuz.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/lupetonevukoj.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae372bd517c---23225290591.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/5fcd25552915d59c78b1e521e80cf067/bepolelosi.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/bolaxitenolilux.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/eb7d228b91ecfb148179e168b67077b0/54431988547.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/wogikadoje.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4404e65d6---49125229612.pdfIn PDF document text
    • http://beta-rc.com/upload/files/kumodoziruf.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/2fb4a408010707777d6bd99883d8ea78/bazebawedurokosanoga.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/0ot7jl6ut4eliolm8qkbkdl20u/58525762776.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/65749897501.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/148v38cf4hp4en2snedr5cgkm7/12698618231.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/285a73ebd07ebe0a6e51686f73549a03/nerukupeja.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/22126503102.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=creedence+clearwater+rPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A6 10100 bytes
SHA-256: 339b1809756f888c0726d00b9362515ec7f0460ab0a377de93b2b48ee8b8de01
font_01_sfnt_off00010856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10856 17860 bytes
SHA-256: 2c68eeef2914d9c08fb42e969f10bfb185e8411dc0ab4d87492e860947a6ef1e
font_02_sfnt_off000135a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DB3 2988 bytes
SHA-256: 686f925bed0a3520394edb678ace1b7fa3047d763a2f87d24a6f05d23e53bace

Open this report in the interactive analyzer, or submit your own file for analysis.