Malicious PDF — malware analysis report

Static analysis result for SHA-256 788f809cd6a68869…

MALICIOUS

PDF

85.7 KB Created: 2021-07-02 03:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 917df1ced18dd1c0fb76c9ca0053fec2 SHA-1: 47d9f0d10a9c3134f96c95494942e19e9d8508b4 SHA-256: 788f809cd6a68869de41361cc842b4ffa128108785787168575b848087be29d9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous compromised WordPress sites, likely intended to redirect users to malicious content or phishing pages. The presence of multiple external URIs and a link farm structure strongly suggests a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa5920ffae---6709695281.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/v5t39b0c2aq73ok718v9pua8tv/28789656283.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56cde24003---bufari.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/ki0kjl9v4fcg9qpkv7nl74l38i/73914771747.pdf
    • http://akicgiyim.com/userfiles/file/futagobowag.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/onukl7e4v1qnul0m926ojtae8p/63063626117.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d53d1eaf6e---97508345718.pdf
    • http://dermaktif.com/imgup/file/3594972999.pdf
    • https://kaptenhoki.info/contents//files/gutaxefanaras.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/e224e5577ac21919e5cabbdc9cc0a4a7/69978144341.pdf
    • http://luxe-pools.fr/i/File/voxupizuwukazosodosofuzit.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/0efd2500d9933e0fe5bac1e4ca0d3b11/4530494087.pdf
    • http://zoncmswebsitebeheer.nl/files/editor/file/36742403003.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/654e80418982a41975de59761b438760/piludelovage.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e0df74e10---23337122634.pdf
    • https://ctapigroup3.com/contents//files/gebimorunuderu.pdf
    • https://groupunsur1.com/contents//files/38919854717.pdf
    • http://canadanur.com/resimler/files/ribozorenudugutafa.pdf
    • http://dakmet.pl/upload/xebewovopafoduxev.pdf
    • http://guchenes.com/d/files/66462981787.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/fa4a397065c4afbc4f130e2872214466/samimipirusoboj.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160747ef3a62f7---semesedekorimesanil.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/g8lvfq3vi7e3tjq2l7v2als747/90200410701.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+format+hanging+indent+in+powerpoint+mac
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ec.bin
ef62049af7ed5d947a5e6077b793f741591aa4c80eb6773e7b655f1e21a47efe
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EC 18764 bytes
font_01_sfnt_off000116ae.bin
c7aab6d81530210a2e48c14c6aece0b955b63d69f36e763f00c1ee87f032293b
pdf-font-stream PDF embedded font (sfnt) at offset 0x116AE 10932 bytes
font_02_sfnt_off00012fa1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA1 16792 bytes