Malicious PDF — malware analysis report

Static analysis result for SHA-256 111d39c75b131a24…

MALICIOUS

PDF

86.8 KB Created: 2021-07-14 01:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 972d6d794b89b4e864526af71f350339 SHA-1: 8ee57313d94687d377849fec3dc61cec91fd9c53 SHA-256: 111d39c75b131a24bfcf098b72a7a2a0c292f19e3d2d4853456bbf80f2bdcdf2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://liubeauty.com/luutru/files/15516780269.pdf
    • http://grandinhr.eu/images/user/file/diguvazopidijedinixogilo.pdf
    • https://ljlconst.com/admin/images/file/jetaziwovakixisurir.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf78cb1820---41747882628.pdf
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/qkrds9goo9jct6m27reluue854/mokuwopunopip.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c022bc8e00d---wivonobox.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/du1b944j78ruvdqb4e9fo4d94r/fodetajetoperikawovafo.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/c574ea448b7d446e6191b3baae6716b4/moriboxegimalugunefinax.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09835500b3---27003494624.pdf
    • http://thaimassagemodel.com/ckfinder/userfiles/files/34463143259.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d78065abc6---jajasune.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/60408622010.pdf
    • http://clinicaveterinariagussago.com/userfiles/files/perexanisebajaka.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607362903d9ca---tidize.pdf
    • http://carrozzeriabosini.net/userfiles/files/94088211613.pdf
    • https://topclassgreenery.nl/images/file/vetavawedeta.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cf7a53000---sugobixajelarapux.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6936cc658---255604010.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/e7d548f4b72b8a7e7a1b02041016bbe7/vewulimisogilupazagoxeniv.pdf
    • http://banquat.com/userfiles/files/dinumewujera.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a13c3e0403b---miperuxedilu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=list+of+most+wickets+in+test+cricket
    • 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_off0000f033.bin
f60bed03bdb59ee98597ba206a5d83db06f20dd91622e1550534d25e0b5e2a3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF033 17496 bytes
font_01_sfnt_off00011e44.bin
d1945b9cad2f6f4a9e9bccf1fc5fe86e474ae8f064031a1ea67de5a73d82f6ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E44 10424 bytes
font_02_sfnt_off000135fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x135FB 16792 bytes