Malicious PDF — malware analysis report

Static analysis result for SHA-256 2368bd02f4880b65…

MALICIOUS

PDF

93.6 KB Created: 2021-07-02 07:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5b420d0f3072bf93f4becfcfbef1b07b SHA-1: 6589ea386411f0a14891f239b851fac9e1603137 SHA-256: 2368bd02f4880b6508a5a94f4a1ff76bfc7dd33a8c8c92a85dbd0b2d44fe15c5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into phishing scams or malware downloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://synerhu.ru/uplcv?utm_term=borderlands+2+max+level+with+all+dlc PDF link annotation
    • http://gaongonmaiphuong.vn/webroot/img/files/nizokufudajorev.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/74641100473.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b119a554bdd---direvokakemezidagevenitu.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/1n67togs25tcn5ukbcn2vl9jq4/luporasonatevovepajiremu.pdfIn PDF document text
    • http://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/59545218550.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dd424dd11---30357052221.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/1f81f927f47b551492174d2e10dd1cd3/korogaz.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070cfba7e28a---19345210691.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/167ceed00229f384deb3c2238d01a473/80017851193.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc1777aa59a---62160602401.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/navutomojubofowemam.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/q8c981pon4uqi97t8geiip9bv1/37823883612.pdfIn PDF document text
    • http://hpc1970reunion.com/clients/3/3e/3eb4c5728feca7eb79feed4eed44c519/File/63879323819.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608433a39b650---togisali.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8eba279f4c---83825216073.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/9f14bde91e62c087b2c8911668672f71/45351201945.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609344b628986---zolade.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/021419446506.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1f6d0e23cc16b6033cbab497d90ed5a4/fizugukopijinaz.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/kabixu.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/025e996002d23a63a511a926fe1420f5/96107517550.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/jikeresajuwep.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608085ca7ee82---jafudesavofeverazubawarim.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/51addd964a24685e76d7fc2996d69026/fafata.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10705 18300 bytes
SHA-256: 320afd369308982cb256edef8609ff8a0e71706ea7a974c2e7d5b59ccbdb312c
font_01_sfnt_off0001375c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F73 11064 bytes
SHA-256: 1d5a989ac933f0808fd15afca79217d16bc6acbaf7b9f891f92f1e585c03461d

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