Malicious PDF — malware analysis report

Static analysis result for SHA-256 f447d3165c2dc20f…

MALICIOUS

PDF

76.1 KB Created: 2021-07-05 12:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 02977f032ea1b08966a88b82e27a7672 SHA-1: 7cbcac3b69c83ec7955c3ad4f6f3c2dda33d7fa2 SHA-256: f447d3165c2dc20f9a0be6db2756a53baa3a18525bd7ffaedec6732a0c775e4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to multiple compromised WordPress upload directories, suggesting it's used to host or distribute further malicious content. The presence of numerous external URIs and the nature of the links strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/01afa2033361fea440ea2b5f92e41a5b/5055758320.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0a31a86386---19335317177.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e10c313f1---69454299388.pdf
    • https://bursac.net/userfiles/file/dowufabaruxutumo.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/78095a17b8d5d1922e5ef91869b49c5c/vimosatudes.pdf
    • https://tramtron.vn/uploads/files/files/905475273.pdf
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/uad57m0j0mjbfhj2cmfvhmeqg5/9831127506.pdf
    • http://petersonspann.com/clients/3/32/32c4b2f41fa698b5b938e848169c8dcb/File/mitegotu.pdf
    • http://apsons.eu/files/file/gejilijetarowejoxegozete.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5cd5a04b2---10992334385.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/hkfvf0jlcj15ptv8l9s8d5ce14/bakawikimodewi.pdf
    • http://learnazia.com/fck/imagesfile/21268940785.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/83jm5i54ajnd88n8hn8sv70uf6/66499936402.pdf
    • https://mattress-leader.com/media/tejunoxaruwozenukedelovi.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/e718aae04c19f019253adb8ab18a6541/20504442977.pdf
    • http://artdealer.vn/upload/fckimagesfile/32496d8cdfb9351ed3e94da720c695ed.pdf
    • http://foodchemsino.com/d/files/58643161945.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/806ca402751cbc4dc7f4cea012faece0/lozajabitexobe.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/94269b44ef4919dcb822e5c34915f96e/72673861754.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a7c2e41f6---tikovemesokijesemetajojez.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16072e38e2cd56---27938082249.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16098e4b3e54be---42152730695.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/7fukf0hvfcq94gb4d09rjjv083/zobafanujedeluru.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/vt3bgcsl547okcm9s0cihla3i1/liwokosurinu.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095cb6a54aff---popomef.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=watch+what+we+do+in+the+shadows+123
    • 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_off0000c519.bin
d252dcc7df91ff18af06aa9e20f40dd1ce7887f04a1a9a832c8146d0a51f5b22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC519 10744 bytes
font_01_sfnt_off0000ddfa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFA 16792 bytes
font_02_sfnt_off0000f60c.bin
2065afc7b172808484351d776ceb9b7ba90ec54d764f27680dcaa42d29300a19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF60C 17424 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.