Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f695d5f1a4d7f8…

MALICIOUS

PDF

120.9 KB Created: 2021-06-26 03:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: bd571a9c61d3d06e9165363e1d60d31a SHA-1: a7fee08995b2ef42e3abe939846dc1f456c73501 SHA-256: 34f695d5f1a4d7f862145d8da2988da4a3f87d1f636e0b4d872570740cb87976
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://chatfieldfarms101.com/userimages/30606059982.pdf In PDF document text
    • http://omni-links.com/64966196812.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/3f5b3a787000c7b8623e3b64579897dd/xemuzanotenesovinibefalo.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609923215b319---bapiwifezunafa.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/ponetamusixusujiz.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160caf4c8a6c93---69064039550.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607879a37cae0---31220149679.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/318db7b5da3b7d48116e66244ea98a3a/vugezosajusivizilonezete.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050600174220.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/demaxilokadamo.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/040d0e2d9313fcda858177346cdfe174/fimuwo.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873abe05e1d---purewafinovu.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a710b975453---25074792100.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/nofawurafezivazamikiv.pdfIn PDF document text
    • http://splogservice.ru/content/file/63221349030.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/c7373aacce0c102119ff3418ba42bd34/dobitumifulusiputu.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/7572739362.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718724cdbdd---sukem.pdfIn PDF document text
    • https://t2sc.me/userfiles/medulil.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/aechs2t7hp89mr4p8jv3fcg8d1/fodatuvudud.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/bbe6421936852473428187b528e52b87/4250831544.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/fcd46beef3ad182042760712b5ffe198/94517552283.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607516db8ff2a---rovunurezexij.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/23869974644.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=have+grown+upPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000178da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178DA 10264 bytes
SHA-256: b32b9e42787a35473f1d49c413e703d64f66e654bca8a502820d49bc531be657
font_01_sfnt_off00019003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19003 18360 bytes
SHA-256: 252c4c43b71cd36aa897aec9387d6f803ce40b1fb62bddee250a6e029ee4b198
font_02_sfnt_off0001be85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.