Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7c49f16429e631…

MALICIOUS

PDF

84.8 KB Created: 2021-06-28 13:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29fdf131ab1775f2c64c89e7449f6ae5 SHA-1: 6ea6ce82d2bef54d6b228d64d3dcf42cb6b00728 SHA-256: 1c7c49f16429e63152a774eafde3b91aaf8e55709bd051f6ff34647e12b725df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the heuristics and the URL patterns strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085593cd9a4a---kufodevagifevoletugejib.pdf
    • http://toyotarentcar.net/FileData/ckfinder/files/20210621_4777AAC78F5DF9BF.pdf
    • https://acronimocostanzo.com/userfiles/file/zazomolugumuwonukarag.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/e9bc3d104b7d91788d5161b7f5ee5e5e/rodejofezos.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607125039e7f1---68481048691.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160889baa7e2f4---70487341109.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba185390b22---99534488196.pdf
    • https://bibliothequeanglaise.org/upload/files/tugibataf.pdf
    • https://ropaalmayoreo.com/images/userfiles/file/68871632871.pdf
    • http://np-laser.com/upload_fck/file/2021-6-19/20210619183020180207.pdf
    • http://liveisagenix.com/ckfinder/userfiles/files/xotedul.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/bsq2olf47rh3srej14tp0ir4bs/58081279499.pdf
    • http://akcjonariusz.com/UserFiles/file/10389964121.pdf
    • http://smn68.com/clients/75339/File/zugagilo.pdf
    • http://t-p-fortune.com/userfiles/file/90440762441.pdf
    • https://advance-pack.com/editor_upload/file/gogorotalafom.pdf
    • http://chi-kara.net/userfiles/file/zodipumuj.pdf
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/riguxela.pdf
    • http://casaalu.com/luutru/files/xarinusexukuzipele.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/14v279864ms524olsukj2lj3e6/89902622797.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/245da5f28d5281a98f6c89c7f9222173/96639734159.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-12/20210512154858659053.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=install+git+in+linux+mint
    • 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_off0000e663.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE663 16792 bytes
font_01_sfnt_off0000fe7a.bin
aff4f0653ef96da44cf03991c93479c471450823fc229c9d89f6bb099dad07ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7A 10252 bytes
font_02_sfnt_off00011573.bin
c88bbe628b6b8765a50a060843253a680a0b5b2e229b599aef4fa843d8a2796a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11573 18304 bytes