Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2d5173c04096ff…

MALICIOUS

PDF

80.1 KB Created: 2021-09-03 19:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 88b05cf301fbf9b5298573d9ef808e65 SHA-1: 8f67d8764010ba61616d39020af78933816655f8 SHA-256: 5f2d5173c04096ff2b16dc2d9914b8114f6905761a2984b0fdb2ddc361cd79ee
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. Heuristics identified it as a link farm pointing to numerous external URLs, many hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded URLs are consistent with spearphishing attachments used to redirect victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://huntic.ru/uplcv?utm_term=introduction+rapport+de+stage+exemple+pdf PDF link annotation
    • https://easy2ticket.com/upload/files/79536049708.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714240a28f0---matezilojisemodajifati.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/zuzaxa.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/zotojuzevefokasesaxugu.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/97999875561.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/85415247970.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b38b10a79---646266793.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/zurawoxetobixijejujek.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160f428c65d3e0---13315031154.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16086a9e087f13---26606754314.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/76583055210.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16075fb7969d5d---daxabeles.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/pegevejenikelaxax.pdfIn PDF document text
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/60523961868.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/94188208886.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/q0f5t1p9ka37cpkrva40k92od4/rexesesitanibofu.pdfIn PDF document text
    • https://kurashi-kyoiku.com/cms/dat/upimg/file/56323488242.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/e87f80fb0dd06d33380d6b853e86feb0/kipemamir.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/4924d50be6238b9609ea918ec6efe152/guwafe.pdfIn PDF document text
    • https://hsdinstruments.nl/uploads/files/fozufesobivunugarukenoruj.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050213115533.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/21634873801.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_off0000d44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC64 11116 bytes
SHA-256: 32011f45cc169dc751d559ea1b02de54991412ad97cc3244e25e0155d3868d47
font_02_sfnt_off00010622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10622 17164 bytes
SHA-256: cb0533888a41ef1df636423ec6f4e96756c7d0be087466adab93d6540b8a7de0

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