Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5dc5bdec3d8e88c…

MALICIOUS

PDF

90.6 KB Created: 2021-06-29 04:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7eb7c48db1a48bc27821ee9bbf11b9fd SHA-1: ebd6058b366b5fa87000459a713d0cc994e1a9d1 SHA-256: f5dc5bdec3d8e88c717f89d5e18afd52e003e24334386d92f3c9983712c188e7
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, indicating it likely exploits a vulnerability or serves as a phishing lure. The document contains a link farm pointing to numerous URLs hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of multiple compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607637c875c10---91545852266.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/4a4d187604c236b20e8532f32d0c309e/narosolexobagegami.pdf
    • http://austria-ex.com/images/blog//file/29088905759.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081ae2f93b86---19079543933.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b975f0664---25493612997.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/obeh4a5ep7vgdjeblcg6cqva45/58698391972.pdf
    • http://dafangtour.com/fckeditor/userimages/file/3595793916.pdf
    • https://baongochoa.com/upload/file/99673650577.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8b4869db5---bidudidolafajibanemu.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e04512923d---xoroguxatorufomeje.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8384c540f7---zelojojimalik.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3f7ce2d05---39818860721.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/1vhkr3qhf1p20dl4eftess9u3h/kodakutipaja.pdf
    • http://panda-es.tokyo/yamituki-n/uploads/files/83507500993.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/g9v7eurafdofbkg7kl2llc5sjl/50540888529.pdf
    • http://drapa-technika.cz/UserFiles/File/gozogowo.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160934ceec3b5a---86978895371.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4eea2c6e3d---90722852545.pdf
    • http://marthomaiticherukole.com/userfiles/file/23631889726.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/lvgkeqqliiicgchn59d17p3gc4/feren.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/genegajirotodemug.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070c8a1ca52d---99403071843.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160778184c3ab7---baranetukonugoxifabi.pdf
    • https://baxsporthorses.com/userfiles/file/zepejizunotexuvesetat.pdf
    • https://luyenthitoeic.info/userfiles/file/zifiramifuxetepa.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160852c850ffc9---53334191032.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=ordered+list+and+unordered+list
    • 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_off0000ffd8.bin
d6015ef9e12e0c62ce094494590936b2932ca83f6ec3faccaa8bf9565d87988f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD8 17448 bytes
font_01_sfnt_off00012d51.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D51 16792 bytes
font_02_sfnt_off00014568.bin
470b2e7b0ca7f46808c1c01a9ab045bda8f35a3e6a232771ee87cb4939adc725		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14568 10368 bytes

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