Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8ec46b029413d66…

MALICIOUS

PDF

89.7 KB Created: 2021-07-04 01:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4c8058a6c3d284c39253a05284ad08c3 SHA-1: 0f4ad890c96c15c4fd541e658428c5d584456459 SHA-256: f8ec46b029413d6697aa6a3ae18b8a69bb26def02541a0af530e5fb8d88c0bdd
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links pointing to various websites, many of which appear to be compromised CMS uploads or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://oniceh.ru/uplcv?utm_term=wollongong+to+helensburgh
    • http://dgjst.com/upfile/file/kojajezafasun.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/965dd86e98542c7c52a1652a907f806c/petovevoxuri.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1412872b7d---rojimozuxo.pdf
    • http://babamoleskine.com/files/file/3520915824.pdf
    • http://tylincms.com/userfiles/files/42165357128.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c24f71e9b---3079674016.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/193cf1f9ef2a9643ec05c68cc6563a1a/gadijapukabi.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dde4efe709e---936332239.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d15722eada---gedejixazowalix.pdf
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/xozepipagoramos.pdf
    • https://fentesmakina.com/paket/upload/files/wavujufajegorusilizamola.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/67im80bn7canmirqugru51sr9b/50813553013.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a44943657ab---10402607347.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/nlluip77e40ddcnpg0b8nooe30/tanamotanasixiva.pdf
    • http://atol-res.pl/uploads/file/jojuvuvubekewimune.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/7ae6a9f37a2a7bf06688c21769f6002d/49061148580.pdf
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/xuvebujixe.pdf
    • http://aristosaigonhotel.vn/uploads/files/4178209131.pdf
    • http://maychamsocda.vn/images/userfiles/file/bavolo.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0644480c9bb23ec66989396d822cfffe/ximaf.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/68e399aa105463c9f8d5c1fac94bcef9/nedagemogulidamejuxejoz.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c11cdced9---sogajipamisebigaravogezob.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c859286f9d---41475684823.pdf
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cff9.bin
4112eff908270e0a9d706f09fd52e74cf8294b94e62f64b70b4b57260624818c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF9 10368 bytes
font_01_sfnt_off0000e76b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE76B 16792 bytes
font_02_sfnt_off0000ff78.bin
2e19856479c8c3226a1f1fa001a754191a2097d0dfbef08b8fb29ec0c6cadf87
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF78 2744 bytes
font_03_sfnt_off00010ad6.bin
e4b703eeac944849383e0e3031569b7c4224d094c150e603750a49c21c9be5e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD6 19172 bytes
font_04_sfnt_off00013bc6.bin
75bd38ff8c7a33ba388ed15505819adc84e17c96074d66fdb223a3c789543d83
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC6 17884 bytes