Malicious PDF — malware analysis report

Static analysis result for SHA-256 a80c896de85a0969…

MALICIOUS

PDF

83.3 KB Created: 2021-07-24 17:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1a6fe4bc44f62dd63a6e14ff7979cdd5 SHA-1: a7631ed17cdd31db9b16d65acc3d4c201a7d33fe SHA-256: a80c896de85a0969aea039c892bbf7dc7d089889a758e715ba97f18a08705fab
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded URLs are likely part of this lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160742f02e0799---zujako.pdf
    • http://alpha-th.com/userfiles/file/99960179848.pdf
    • http://melinterior.ru/userfiles/files/21149285595.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a04e1b54a9c---livolosutoresarot.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609baa09b64cb---feladu.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b6aa5b88461---4378593190.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/avd92lmgvg03iavar5m4je2h30/geleda.pdf
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/11511378323.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/7fagpf2vdb63bln4s05ndsel9m/35182001614.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d934185338f---gukemok.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f1042e6a2---48336236053.pdf
    • http://vieclamketoan365.com/upload/files/55566763226.pdf
    • http://tuanayapim.com/rsm/files/bupif.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a300d8d9e---32611962101.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608be86e63cfb---46572342560.pdf
    • https://leuphuotcamap.com/uploads/image/files/kujodalik.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/sonaje.pdf
    • https://steammining.com/userfiles/file/vetekisapate.pdf
    • http://workcoop.org/fckeditor/userimages/file/20210605222126.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/128851fbed9cd03a1fbabcc37ec51a96/44348984544.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf1155519f---jokapojas.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/b49c85e1270a55bc0f0d3d0e2adcaf4c/jaketewuzutefaligejuda.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f1a736733---99429669655.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/510c2a9c0d20487e5e0ef74dd72d2db2/wevusik.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+much+to+get+a+coin+graded
    • 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_off0000e4e3.bin
d66964c56391c4d50c15b551c60a00c4e50bc84b197bb2af641def1413121fc9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E3 16340 bytes
font_01_sfnt_off00010f68.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F68 16792 bytes
font_02_sfnt_off0001277f.bin
654e0916d41ecda1294609a869c4b0ad8a2a3e5ec7061939433cde3b61f19d6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1277F 10780 bytes