Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a93753067c78cbd…

MALICIOUS

PDF

103.4 KB Created: 2021-07-06 10:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bd51932b7a5ba5a469b62cb8c4aefda2 SHA-1: 35cd78344076b01d2394e7fc2dcf125d557eae93 SHA-256: 2a93753067c78cbdb854853a08b2eee4b3a5e6de280c9094ae8940d502fbf59e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting, likely to distribute further malicious payloads. The document body is unreadable, but the heuristic firings strongly indicate a phishing and redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ae33e4b98---jaluduvasijewubulixojar.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/c6a8th6gfnfdjjc4te4egcaojm/donumusaba.pdf
    • http://anandamsanyal.com/userfiles/file/gipaletulobiwekuwef.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b323c986e94---zisuma.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc8bce821d---66613843354.pdf
    • https://suadienlanhhanoi.net/upload/files/xuwovozemufufom.pdf
    • http://armanetti.com/images/9029218665.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/jo3n3jpkmt0a0he4ogkhqhrsbk/34613385137.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/6dbf23e3adde16fcdc84b1e9209f620c/2472984298.pdf
    • http://aucoindeshalles.com/menu/file/xudelezepit.pdf
    • https://badoza.net/userfiles/file/sagamosejapavu.pdf
    • http://saglikligencler.org/files/files/kevibevufanumudiw.pdf
    • http://kstarsmall.net/userfiles/file///dobax.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/e1rmffoigjguh2ql9939kplb28/28054312794.pdf
    • https://idd.no/ckfinder/userfiles/files/81090311738.pdf
    • http://ampletrekking.com/userfiles/file/26887704602.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/2kiagf93fccqsi9b3845o8di10/zumuxapulelufej.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/4b8b5984d5d22b971dde2e7008903227/dasef.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160987fdb0f494---sulaxowirirasedopetugin.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a58047ad43---47699590991.pdf
    • https://fcr-fomentoconsumoerenda.com/uploads/files/defidakowalavebobot.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/tdo6iik6s8mf8c7sjjlte7h0e4/35352692155.pdf
    • https://presstone.hu/userfiles/file/74049612304.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609746fba9bd0---59034962439.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160809283da080---4760084036.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=girl+baby+names+in+tamil+starting+with+s
    • 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_off0001305a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1305A 16792 bytes
font_01_sfnt_off00014871.bin
3c7a3f3b6235af9dd58ae0b2473ef91cc122fdab9e274618c1b5f71d746b6504
pdf-font-stream PDF embedded font (sfnt) at offset 0x14871 10812 bytes
font_02_sfnt_off00016145.bin
d14743ffdd0aa26dd1391876ae4d5fdbfd89a74fbe4d5a4646781ee449710fc7
pdf-font-stream PDF embedded font (sfnt) at offset 0x16145 17444 bytes