Malicious PDF — malware analysis report

Static analysis result for SHA-256 0698925abd670b38…

MALICIOUS

PDF

84.0 KB Created: 2021-07-17 21:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 713f6d3f9444234c9e084993cb17c1d5 SHA-1: f535c0d0cdecce9148245b535329ae3d8f7f1f97 SHA-256: 0698925abd670b38c8a5eea54a2fe9387cdc4bc95949ce6db3e6e86d0727e7bf
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_MFA_LURE' strongly suggests the document is designed for credential phishing, specifically targeting multi-factor authentication or one-time codes. Numerous URLs were extracted, many pointing to compromised CMS upload directories, likely serving as landing pages or hosting further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/c9c01bca615026efc997106fd1e5172f/rifejax.pdf
    • https://electrabicycles.pl/app/webroot/uploads/file/16231599648377.pdf
    • https://pacpartner.net/images_client//imagesfile/5525832352.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/o4hsbqt20bauia347dmraun5c6/18311451073.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608615649f0f4---nujinidatatiligunot.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/a341503d1062d7a4c4ac9d2c4fa7db9a/78029914099.pdf
    • https://lotteppta.com/beta/assets/file/41160809632.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/1c5355e90ad7ac4d0dca6ae60fa233a1/dapimisoxabelupelurujaf.pdf
    • http://bookblog.kr/data/file//files/95290372540.pdf
    • http://soflocops.com/clients/67403/File/zoloxepe.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/1e7ac94ccb033eb3e1ec02dc48de8fee/35583524423.pdf
    • https://vyrukrc.lt/userfiles/file/fibatalat.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/efum9oojqg5hntiggv6vmmacjs/4926011427.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/3321c80c00f2efda4749391266313f6a/ginewododota.pdf
    • https://stratasphere.online/userfiles/file/redifogujirerekutex.pdf
    • http://garantc.ru/userfiles/file/14480257692.pdf
    • http://goldenrulelodge24.com/clients/860883/File/jesefoxo.pdf
    • http://crmloccitanecr.com/campannas/file/31417780129.pdf
    • http://sartoriaventurini.com/userfiles/files/kizulowepulusaro.pdf
    • https://isosklo.cz./uploads/8103071875.pdf
    • http://asustainable.com/global/file/87466704105.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/bf29e253d6924da1ebc208cd272fd8d0/kiruvoj.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/67c38d0c6bf0d1685eefd3ea11c67b71/21170949340.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=puppy+double+teeth
    • 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_off0000e76b.bin
5c7fbdcbf6b32648c5be9db1542497c505118416d9274a9485ebca7b7b847a22
pdf-font-stream PDF embedded font (sfnt) at offset 0xE76B 10216 bytes
font_01_sfnt_off0000fe3e.bin
6120e1fc3e22d18009af0c465eaa0f7fb55817bcd53f88055c1816275eea51b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3E 17064 bytes
font_02_sfnt_off00012b1a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1A 16792 bytes