Malicious PDF — malware analysis report

Static analysis result for SHA-256 64189165696391f9…

MALICIOUS

PDF

81.3 KB Created: 2021-06-30 05:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a509f5b0df592d8e95a2596e34a998bf SHA-1: 9107a5edb894819adbeee944c794bc3fc9f22d50 SHA-256: 64189165696391f9916ce6ac216c36afef99137f42a872f11a8f7c535f673516
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The primary attack pattern involves tricking users into clicking malicious links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://animationcoach.com/userfiles/file/8028862164.pdf
    • http://euro520.net/userfiles/file/16245036381742567142.pdf
    • http://shqinze.net/admin/upimg/file///zozasidirukuxixufuvem.pdf
    • http://allamericannursing.com/userfiles/file/vivobomorebavo.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160759d40f3430---78244958412.pdf
    • http://botosani.ro/img/uploads/file/sorobot.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/mc3ogbf6mct4qubtuatdar673n/94417277273.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/9d1236d5778a345752b3217a27ae2268/60191568606.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/09e9l9uug7osth7o97djeu3t9k/lipagefubipatotogefab.pdf
    • http://shukokai-voves.fr/userfiles/file/vagutarisemexojap.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073609ed1333---pelogasaselosujuk.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/1f7977b5e5573f94974e7321a051d587/18744954878.pdf
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/95664424887.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/bf5iathjvth66vcs179p4qvhg9/21123448451.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/df7b9e7cf24ced3aee6f8f8a301e3ae1/kidasizisazevuzaluxig.pdf
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/87177298336.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/8ab5be46bcd20625611c9bc77d8fe82d/18291828543.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2cc75dede---wasam.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096901e7360a---duwofekojosibeludozome.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/a49qe8sl009q7j5t3jl4abct82/nawepet.pdf
    • http://angelofthewinds.net/ckfinder/userfiles/files/sonubonavuge.pdf
    • https://bancodevida.com/bancodevida/admin/images/image/file/35577575239.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/2r7g7p86ivreor3pck7jae15e9/47245098519.pdf
    • http://kolkandkolkdesign.com/site/data/ws/files/23696690258.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160874cfe201b5---xadirufoxurino.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=one+last+thing+before+i+go+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_off0000d846.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD846 16792 bytes
font_01_sfnt_off0000f05d.bin
493060f16d030841ee2611c62038b68386a42518b3ea8d635308586a3ab01bdc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF05D 10944 bytes
font_02_sfnt_off0001093b.bin
17f79e1ad9da3e836050465e228dbef4d0ff80cb467b4760aecdc8e66d5f3dcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1093B 17736 bytes