Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe226872399715ab…

MALICIOUS

PDF

85.4 KB Created: 2021-06-27 04:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 37fcefd63ac9929090f623714185236a SHA-1: 308a2768b33e3688384683edc4a73c16483fdc35 SHA-256: fe226872399715abb9b1da0fdf2da530406770724f2d6b84f3034c36720f7fb0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to redirect users to malicious content. The presence of external URIs and compromised CMS upload links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://crewmak.ru/uplcv?utm_term=is+a+mammal+warm+blooded
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/d7a5c9edba05e9c34dac908a28b72137/28347212724.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4ecea637f---rilevisumosunonu.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc14a85020f---sufiruxalipikaxupelu.pdf
    • https://heks-tech.com/app/webroot/userfiles/files/riruposabewatuvameg.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/76def6993a7a9ffb31407ab5ac3c7584/lalamobusaje.pdf
    • https://anukulagrotech.com/userfiles/file/rifapaba.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/4u0q69uhfotiri1j3afin99rmf/nawiwamezorodekukazorasa.pdf
    • http://absolutelyneon.com/userfiles/file/zibupoxopevaletomorerov.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/c78476d3d94d19e3bb81ec92082cd339/94682641643.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/kkrl2f7ciquuot9pevlcogvbfo/kanefidiwat.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608859fd10702---210290328.pdf
    • http://master-sign.ru/ckfinder/userfiles/files/91756091502.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9898d44208---baviwulesunuvuruzi.pdf
    • https://bursaangka.com/contents//files/8460852420.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bccc1554a---86012464999.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/072fdf1e40c1215cc7cadd1f488fbd1c/faluforog.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c5744b0e3---xovis.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a810b6825e1---zedukudilovesulunusujiti.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084135faf576---difaxidelevosodenu.pdf
    • http://deshdunya.com/blogimage/file/dawajoreni.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/4ec6da2ca7d049399113e4fb02fe1384/nogisivifalip.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16087818e6544d---jizogonof.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_off0000eb36.bin
86f95629ab3ff65337203990190dd932a8f1e90b8cbc512db5609106a4e84cbb
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB36 10292 bytes
font_01_sfnt_off0001026f.bin
faaf078866e01b87d08b2c4c3d692b9f7ef65a44c90fa9b336e25ba04f2a34d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1026F 17644 bytes
font_02_sfnt_off00013067.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13067 16792 bytes