Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d929b53959d3fc…

MALICIOUS

PDF

82.6 KB Created: 2021-07-03 14:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 153eab143435ad16eb10b8256a9b11fb SHA-1: 2f156ed61e2e1a013aa5fe32f901be14da8a2d8a SHA-256: 85d929b53959d3fc9db532ab5b3ea869e3572f383da6bd5ce83b877a700c6aa1
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm. Multiple URLs point to compromised CMS uploads, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the structure and URL targets strongly imply malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://iohrp.org/f_files/files/tekewesugorefuk.pdf In PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/15ac17ba600460ce75ff9b7d474328d4/74009457742.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f06529008---59694344430.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/zatisesowegela.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/palujajazo.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5bc21d91a---23381190632.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/digoxi.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070b5fb5dc0b---pigekokovavubukukerak.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/podajupikizujujanetuja.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc18ec1cbb4---70617717016.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/56476570269.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077068160dcb---fiwuwugubedelapezikiz.pdfIn PDF document text
    • https://kawanmto.com/contents//files/jepujixuso.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/59441685527.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078074794908---mazexabokodidururej.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16087a9ee5e548---xinufekakaguref.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/53320066261.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc2ab15098---29051449074.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/e0af95fe8aeb29b9391eb1abe89e6c4e/kefutufape.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/46bedce446631ddd1bb67ec9506475d4/51390870032.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210621115116152.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/37417145932.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/df6c7360597feebe3306ac73cdb2f234/94500951591.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=cyst+on+tonsilPDF link annotation
    • https://medlineplus.gov/tonsillitis.htmlIn 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_off0000e509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE509 16432 bytes
SHA-256: d1da3333491fe0add7365a9c08127a7c45ed9c50f1642968f856357be9e6f1af
font_01_sfnt_off00010f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001279e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279E 9852 bytes
SHA-256: 60c26ed8bb38134d17c35d7380fc4a5e078f318db55fef23724ac9aaa982d689