Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3507210e2434121…

MALICIOUS

PDF

84.3 KB Created: 2021-06-28 02:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29c6edb805b1640977e0e765a76120db SHA-1: c6e56f607947d4f588c5b346e3400022c846540f SHA-256: c3507210e243412151a8c46a4dfdb1a4d90285aeacf2e950b12654a56918b8d0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766e6155462---bexurad.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/e0b1b4a4276d5571046b78a206a04c62/burusifogenexifegat.pdf
    • http://polymer-optix.de/userfiles/file/jugulobozoxadulejepol.pdf
    • https://thefertilizerequipment.com/d/files/88543896953.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609851aad2374---siboxa.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/47a6fc696a03c060a73fbee54c9b3369/11892763328.pdf
    • http://amandamaitland.com/images/file/savalajedaxof.pdf
    • http://sarljarry.fr/userfiles/file/lavuwuwotude.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/m6kukml56iic4rb29qh6hrt75c/14480825788.pdf
    • https://artlabjo.com/userfiles/file/zigisotis.pdf
    • http://autohondl.cz/userfiles/file/movesilisawufezo.pdf
    • http://inter-travel.hu/_user/file/zixetikeni.pdf
    • http://studiolegalezullo.eu/userfiles/files/xigal.pdf
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/gapisobexitevojavodix.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/ha8ubhsmv6fep8b0barvm2cns0/xukan.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160854196cd8e9---jipiwo.pdf
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/paxabupunelavi.pdf
    • https://digireg.es/upload/50673743862.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44878e0f90---93995092484.pdf
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/tanetesuberuvorolelib.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/hb0b7mqtl8sh302btfeaojb4a4/71414395735.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac10f9091d2---60214719431.pdf
    • https://biocoils.com/img/file/rojejo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=things+to+do+near+prineville+oregon
    • 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_off0000e82b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE82B 16792 bytes
font_01_sfnt_off00010042.bin
93f3fc5f372a39e54e6e9653989e5cae27b05393c1c68719c1d4f2616b1de6c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10042 10700 bytes
font_02_sfnt_off00011887.bin
c5678d233b7197f1b73f342a07d5d4e5fe1b2f0536087c8feb0bc59aba2034f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x11887 16580 bytes