Malicious PDF — malware analysis report

Static analysis result for SHA-256 220b1aee46de55ac…

MALICIOUS

PDF

90.3 KB Created: 2021-07-27 13:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 77fb86bd408e86d6888a7b24b7207344 SHA-1: 755a09d03059b9c8a75a0b383115cad25218ddc0 SHA-256: 220b1aee46de55acca22a71c89dd9960e68e17a49fd1c9fffc2922be82018976
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://magendans.com/imagefiles/file/17504569823.pdf In PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa4000c325---91617209512.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/98896884947.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/db9906bd8dc263e6007a679a2198112e/67599186677.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/bccdc87b2331e0168ab3b3f9949c539e/16382875161.pdfIn PDF document text
    • http://www.ks-zahnarztpraxis.de/upload/files/wipugikijaroxawelib.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/wutejuledeso.pdfIn PDF document text
    • http://dahchen.tw/userfiles/file/34989819524.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210610043345.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/83514215393.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/84400060725.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/62516152418.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/qvu91vp7bq2dohmb5am0lmlqgt/sakamarowokuzar.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/tifemamaxa.pdfIn PDF document text
    • http://fletcherfamilyreunion.org/clients/52745/File/wagusigirirasak.pdfIn PDF document text
    • https://edinburghpools.com/contents//files/fuxumujomi.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/pasurivimasitib.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16083340f3d251---felifa.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/361c2bc7b14ef6e622a1c4c8b5b819c9/wigonemagipavavamemifed.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/57fteasa4v9plsg1u2bqk0pvog/doserakutag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=career+portfolio+wordpress+theme+demoPDF 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_off0000fe48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001165a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165A 16628 bytes
SHA-256: 94198b0437c64ce047b48c36df7d2ce81bc4d4883c4a62e950e0a4fe470cea98
font_02_sfnt_off00014191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14191 10776 bytes
SHA-256: ed494c2a0fd76ec991d7a13b2aca46b4047b388245c672fa0281b4661c07261c