Malicious PDF — malware analysis report

Static analysis result for SHA-256 110df73a213ef673…

MALICIOUS

PDF

91.3 KB Created: 2021-07-22 07:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0365a716fca575f339ed2d94748e0a09 SHA-1: 07e405e3b93ce5904ad711a0f920281847980691 SHA-256: 110df73a213ef6739a88617a2ab0a56cdf604aef6c13023c39104ac73eae0f16
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for SEO manipulation or phishing. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings are sufficient for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://everest-c.ru/ckfinder/userfiles/files/kidis.pdf In PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/2e9c685365f7a5ed83771398c4ed9c8a/23253705031.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/32981d1356a664db3553a2686ff94fb8/xabem.pdfIn PDF document text
    • https://banghenails.com/upload/file/kagekesavebaz.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/7ced91ca045dcf00588e70739de31902/73402189476.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/12001764454.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/88916514391.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/mem2so1dpc7p2s6j0eg8s2s8ja/kabisoxonewewefedamifulim.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160866d8a1266b---wagakidopijaniril.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/rcmu3ngub3o9l6vejkg603oi03/61013395705.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/59473253211.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/80260739672.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/e983c742d21fc9d873c1679ccb74542d/lefape.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/tixemufofegawofud.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/cf1ef602c5c847d4d68a09dec2a9bd37/64104667176.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d72c55ce1---gezuxebebigupomupabudarol.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/it9bu6f3m1ouj9c2m81i0mrjec/94295102843.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/12624806790.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6a0008e463---10817126287.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608709bb3f23c---posasafuzozewilosufaduvax.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/duruzusefeledurilujer.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/zekedikumodafefabuzoniz.pdfIn PDF document text
    • http://tate79.com/clients/868750/File/pexulajo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=five+number+summary+problems+and+answersPDF 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_off0000fea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA3 10936 bytes
SHA-256: 7bebb4b1658af0a8ffc744a3db7acb468053cb71b7b32b291088c47587ddbc5f
font_01_sfnt_off000117ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BA 17748 bytes
SHA-256: 87898759103833bcfb6786625f221959f5b9a76d3fc3f6cf19e9d3c3401f5e7c
font_02_sfnt_off0001464e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1464E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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