Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2649717c06b5f7…

MALICIOUS

PDF

89.7 KB Created: 2021-06-26 08:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 92ebe7971e090b7349f73c74ffb7158d SHA-1: 02a76413cd77bb267d1d23df75d26bbab830f4d2 SHA-256: dd2649717c06b5f7aaa81deb4ea82f89a18cf3ae1c3a3d1f91cbc4f2d677f02d
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting it's part of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://www.niziointerior.pl/upload/file/sevatefupozukefoninufip.pdf
    • http://tieclangman.com/Images_upload/files/bonekuvizopamitivu.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4d245143---58119411768.pdf
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bc8fe91d8---61288347982.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b042d3e983d---37986829964.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/l61lv3dup533d2prklrt2iut73/mobumu.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebb9e25463---12046850447.pdf
    • https://llsindia.in/FCKeditor/file/45636472344.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/68c0a321a0c5dbf1c3e1c141fb14e12a/lelek.pdf
    • http://jmvlpslimited.com/ci/userfiles/files/39815779279.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/4a9d13299af15ce255ba431fd2cfbe4d/89561114091.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078a617a2b0d---xoxupigamitekexa.pdf
    • https://golf-tout-terrain.com/publish/page/file/ganamakofuge.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16097d61bab5e4---vajixoleseladijotovud.pdf
    • http://koszyczarek.pl/userfiles/file/naragapafubuzufazojomod.pdf
    • http://rebeccafantarchitetto.it/userfiles/files/95082571536.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/70707b748190886009c24198552eeb9c/9351745976.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a8ddc924e---xatibogidufusiganali.pdf
    • https://augsburger-dartliga.de/uploads/file/30278624855.pdf
    • http://namthangbasaltstone.com/uploads/image/files/33326295812.pdf
    • http://caffepontoni.com/uploads/file/xixinolegalarana.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c1548b398635a8312e90687f40f4bafa/mafedomuwunakiv.pdf
    • http://yulintimber.cn/d/files/15385028080.pdf
    • http://files.ibiza-ferien.de/file/vasifarapemusogasawirane.pdf
    • http://51www.org/uploadfile/file/adb6e944f185664a88efb7fbaded0128.pdf
    • https://itracmediav5.com/ckfinder/userfiles/files/92213765578.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=ghost+cod+mobile
    • 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_off0000fcf5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF5 16792 bytes
font_01_sfnt_off0001150c.bin
2ac4ba20a4c70748a3d48cdb3e9adb652be3189417b9697a230282dfefe63c61
pdf-font-stream PDF embedded font (sfnt) at offset 0x1150C 10448 bytes
font_02_sfnt_off00012cc0.bin
919ae84bcd933e93c6cab794fa32d775474348da549f610190c13bc2425dec6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC0 16776 bytes