Malicious PDF — malware analysis report

Static analysis result for SHA-256 0259d62a5dae7ed0…

MALICIOUS

PDF

89.3 KB Created: 2021-09-02 02:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2f70b73a93cfc4be05ba6880a9fc7b50 SHA-1: 7d5de15adfce6d223121c126db5938de56504b92 SHA-256: 0259d62a5dae7ed0db83405145026354c3a1f298fd1ca212db179adc8f1c5d94
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious files. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b00a71a33---54122610328.pdf
    • http://anhuifan.com/upload_fck/file/2021-7-16/20210716224717649753.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/0b4fd30f78320bd2b5c715f4b4405048/61654323898.pdf
    • https://kartplast.com/resimler/files/9674018942.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a18d41c121f---zuwuzonov.pdf
    • https://tatsolarlight.com/uploads/files/furivifokexewerabalarig.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1305c61c0---zuvotiwot.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607499f408d8d---76026532246.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611787c966116---87114837007.pdf
    • http://purepassion.pl/userfiles/file/kawinaviralitopidet.pdf
    • http://beamstraffic.ae/amb/userfiles/file/veguduzu.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/vd42brn1upjsgqb7lartnht5af/kixogutesij.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/pci7lkt4664ov5d3jd8cpkj7es/26874763110.pdf
    • http://apartamentosalbatros.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd216647402---sinixefige.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/2d133cde8af3db45601423449e79d64c/mupizupidawegikajesasowo.pdf
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/44345008633.pdf
    • https://mimpishio1.com/contents//files/finawixipilolakofipamuvud.pdf
    • http://hz-kontejnery.cz/ckfinder/userfiles/files/21043615495.pdf
    • http://eaas-journal.org/survey/userfiles/files/54868830760.pdf
    • https://relans-nn.ru/images/docs/file/24803097771.pdf
    • http://kyea.org/imageuploads/57356299308.pdf
    • http://nkmate.com/FileData/ckfinder/files/20210813_C7C2E3C612B94285.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a8372cfbd---xetidugurugotewuvixivalu.pdf
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/51493057232.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=pc+space+cleaner
    • 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_off0000eee2.bin
0f4f1f22218ebd4a65b791e369a2fb064f52218ffeb497a2b648c522f51cd21a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE2 22168 bytes
font_01_sfnt_off00012937.bin
d33c4c91cd1f34bc59ed025d962683d59571ab3b89b5a196e32c40081058ff14
pdf-font-stream PDF embedded font (sfnt) at offset 0x12937 10056 bytes
font_02_sfnt_off00013fb6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB6 16792 bytes