Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a2a03ff304050c…

MALICIOUS

PDF

84.7 KB Created: 2021-07-08 10:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ad0e314b9ab0e74010d5908c3e214977 SHA-1: 8ab506096661c2603171f2836868973adc46c5bc SHA-256: 92a2a03ff304050c9167c748ce0f634e317e3a04bdd4a2d1829273ca1f0a5a50
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to a variety of websites, many of which appear to be part of a link farm or hosted on compromised infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://queure.ru/uplcv?utm_term=cae+use+of+english+exercises+with+answers PDF link annotation
    • http://lookkorea.net/userfiles/file/1985779757.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/38803069179.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/kasujoteputekugogibaxiv.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/vujaxolutadumupe.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/68359912236.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210630041133.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0610/73e03ecfd1768896f4f38cd3ca5500da.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad0f1e4157---vumexalodani.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/35230553958.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/l2lf3ea5bgkveg05uif6h99l05/wasokamu.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e67fbbc01fc---niwaduvibutelepipedura.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cab07dc28f1---zovaguwenosuzudagib.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/75097047087.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/73872460810.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f6b46769f---68911846395.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/61605025277.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/c31800369c708963aa8489290daeb765/gujufezeg.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f49b41b487---36674095322.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160864911dfb1f---84985550964.pdfIn PDF document text
    • https://saporidelletnastore.it/file/65804463283.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/tinebedopudobuwebazivonin.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/48919353904.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/fct5fqckotnf1ahnks3ns2n2g3/fiduwebidevudavu.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/k3137mn771aksr73fbaqtbhr50/58429409116.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ddbfee48282---34296341318.pdfIn PDF document text
    • 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_off0000e8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D2 10932 bytes
SHA-256: bcd75726b46d79859bc7e6ff60fafbdb8d65973b7b65a198ed5e67aae304c997
font_01_sfnt_off00010237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10237 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A49 16720 bytes
SHA-256: c113dbeaea95989f45e0eb981c6e3a1b22c97c1f824d69ea59c693d12d2e5e1f