Malicious PDF — malware analysis report

Static analysis result for SHA-256 211a389d6ec08a7a…

MALICIOUS

PDF

80.4 KB Created: 2021-06-28 19:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 325c643b036c7a956f5c65aec85a2159 SHA-1: 01d8027ea3ba1bf47fa292f2192253faf2526e8d SHA-256: 211a389d6ec08a7a07ca2f105ebce2651b7ab6e615415d1c241925b73fd96676
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links are likely designed to redirect users to malicious or phishing content, aligning with a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/7606c9b565425ab7ad284171565d482d/werobemijakow.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160801857b4463---zabefovososapixireg.pdf
    • https://catbasailing.com/upload/fck/file/44504983967.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757eef3da06---94287106706.pdf
    • http://ud2-140.com/files/rogiviluzatilimiz.pdf
    • https://sfeerweter.nl/userfiles/files/fagupofelenenuwew.pdf
    • https://tepihtrava.rs//files/15109366877.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c86c458f80---36560406128.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/69d5bf40a03b65c74079808b2ace2f41/tikigigumaziranozuzu.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160abfa118b91a---lusoravenegu.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160799ff199b51---35338018704.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/e94d236067e052374dfec517109c7f2e/68314417577.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb88da839e---67039047237.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/dlelovu579ke1jvlq5gqgj8gi8/kexovepikivuwuwasekeb.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072542ee1b12---53270874040.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c40677e635e---29613683059.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7b94ac34a---kuxubuvaxa.pdf
    • http://kiuruvedenlukio.fi/tiedostot/file/93372383126.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/a0c324e408857e6e244758981e2cc30f/1358031768.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608472c7f271c---12929134928.pdf
    • https://batikatravels.com/userfiles/file/tajovapukuranovawi.pdf
    • https://cornerstonelaw.eu/userfiles//file/tikemezinixuf.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075dafb71685---6421233816.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/960bf83dc2e6f8e142ef33cca12aaf0c/bimegaluwiv.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/d0cfad98fda94fd04d471daa3ea54709/82630966855.pdf
    • http://beiwendq.com/userfiles/file/15787951269.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=companion+for+1st+mbbs+16th+edition+pdf
    • 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_off0000d471.bin
75277874d042a665d5a55acdddad1a98a6e7004edff8630613e7e01983162d40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD471 17396 bytes
font_01_sfnt_off0001023c.bin
e5dca143c7dddec40743413e3c6d003f4d6876fb07a2c60309d6e16d7b3895c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1023C 11108 bytes
font_02_sfnt_off00011bd2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD2 16792 bytes

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