Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf2957c16ef43cd2…

MALICIOUS

PDF

102.3 KB Created: 2021-07-01 22:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 019c6fe36642f86413c87ddffce56124 SHA-1: 7130fd1a6b0f1e5451823a3ef2d7f63d96d10661 SHA-256: cf2957c16ef43cd21082ce9e9e92bb398fbf17d489c959d43703deb14945a927
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories, indicating a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b8bfd761a---mopozozumafivogakadaga.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/l1523keh2m6e2nci2nl6823i99/81382288867.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791a710355e---dudiwadepasamilozisab.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/m9gnuksnrcrugdp3n4vm7qho42/rujovemisaguxuvur.pdf
    • http://jfac.kr/ckfinder/userfiles/files/53000789397.pdf
    • http://turinhotelcompany.com/userfiles/files/vowukalodafasipujovofutek.pdf
    • http://parvazyab.net/basefile/api203/files/pafigigugisutekov.pdf
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/latupoxapupufodozakusu.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7da413ddd---69151724055.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0c2d87f79---7142717843.pdf
    • http://www.bash.cl/media/file/noriwelebafodi.pdf
    • http://kids-ex.com/rowagiponiwisaki.pdf
    • http://meble-tk.pl/userfiles/file/26623392262.pdf
    • https://tessuno.com/upload/files/60cf5565ea68c.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/86bf8304dbce9d613e56031a3bdb23ad/33594825782.pdf
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/12241058465.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/734d6e50d53a49088e85729cf4a114c4/luregigemufevozedorudek.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/0fs9mhk2b7s519b3mt4m6do7b5/87492249960.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f2d5f6f96c4d0151b15c3185254e885b/43980506039.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=aladdin+questions+and+answers
    • 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_off00012f7a.bin
6dd3f6872bc9abcfe15ad71812cfc2395e806388e4df79665bd7e69638dc186e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7A 10556 bytes
font_01_sfnt_off00014789.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14789 16792 bytes
font_02_sfnt_off00015f9b.bin
3381d294419172d05eb73595a5db375b4edd42b02412ce00d6932a2e8117f776
pdf-font-stream PDF embedded font (sfnt) at offset 0x15F9B 17272 bytes