Malicious PDF — malware analysis report

Static analysis result for SHA-256 97775dc70ad6bb7d…

MALICIOUS

PDF

95.6 KB Created: 2021-07-01 00:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d85d0a2332ed9993cadadaa459295795 SHA-1: bfc2b86b3bddf28c7aafa4da42073e4d1eaa91b5 SHA-256: 97775dc70ad6bb7d1bd709bf96440a21d8c34a770c7425cd4521da47119a99cd
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites hosting PDF files. This suggests a phishing or redirection scheme designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608849196661b---6877679943.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c55f95cbdba---mubugolosefu.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/r1d5239i2ll6ra1mfr5uhnbotn/lutaloguxevi.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/602cf12e898f7ccc7afe3e93c785a675/72097454086.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2884cf3b1---11997894988.pdf
    • http://zerosquareonline.com/file/mumolapo.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5d7032f3d---68706589107.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/ldir4uis6ags6ic2na0rfuunh7/kebaduzolovefagajoseriko.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/d86q2kaah7srh7o5n1r5c22hkf/giwasidoluxo.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccb38a7844---feputogulusawinilet.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081cd5c01fbf---porimiwafetiv.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae2ba7dd96---85981185565.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3f90172fa---56963748161.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097750a09fff---51829826690.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/8bd97375d7d51fbbaabd56cc01d107ce/23407669334.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/vh0uirpf1o4d848djd0vlgssoa/26998179653.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/0a9e9c0e021f5815f2b0cf22f3187c6e/88985424488.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db7f2986c75---fogaki.pdf
    • http://isystemlab.com/admin/ckfinder/userfiles/files/90179369982.pdf
    • http://basaritarim.net/admin/editor_resim/file/29215844210.pdf
    • http://geostudio.eu/userfiles/files/5018266341.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841a34ba8dd---riserifarupegozaraboxoxem.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2ebddcfd0---30172390517.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=10+tenets+of+liberal+humanism
    • http://janyska.home.pl/_mjanyska2013/fotki/file/91415268852.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_off000112f3.bin
1cea52832bb59d68d0058dab51351b2bdcfff9bbcdefb84079af72b435c90d53
pdf-font-stream PDF embedded font (sfnt) at offset 0x112F3 10796 bytes
font_01_sfnt_off00012ba8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA8 16792 bytes
font_02_sfnt_off000143ba.bin
c0f34b98e3f55d42849178d58d44f94ef630f9aaee5d42449576f17e2ae424b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x143BA 17576 bytes