PDF malware analysis — malicious · 979c9f3f556da4dc

MALICIOUS

PDF

87.9 KB Created: 2021-09-01 20:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: adf3429911903ace89f02bc176497ea1 SHA-1: a45af231906fac15683ba1af22d0a41dd23a0dc3 SHA-256: 979c9f3f556da4dc045c250878e89d001ea0442d5e789bf0fdd2e141e4c98ade

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9972

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://wisdomtours.net/upload/file/nadezikeg.pdf In PDF document text
- http://tbvshungviet.com/upload/files/zixigesuxagimadopivapip.pdfIn PDF document text
- http://motivationandmomentum.net/ci/userfiles/files/zitela.pdfIn PDF document text
- http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079968566488---bokexukepatasova.pdfIn PDF document text
- http://meskerjager.nl/media/files/10427206333.pdfIn PDF document text
- https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae22999f129---pulasitebarikuvir.pdfIn PDF document text
- http://arunimaflavours.com/userfiles/file/fepeginamulilapiges.pdfIn PDF document text
- http://diakmelo.hu/ckfinder/userfiles/files/2277665454.pdfIn PDF document text
- https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/cda21092845868793598978e5f3335eb/gukaxabovop.pdfIn PDF document text
- https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/l472i9qhmhb2i23ki62av60p8r/10951043508.pdfIn PDF document text
- https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/6uh5ov0cb847vh0ap4fqsbvobh/96393425219.pdfIn PDF document text
- http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/86598962cc5ca6c6306ab23fe1fd78d3/katuzolamesajudopuxavufa.pdfIn PDF document text
- http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1276cf9d---ketunijatedovepur.pdfIn PDF document text
- https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6250127ce4---88292726702.pdfIn PDF document text
- http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075995f6a2f2---dumusaxelanujesufuxa.pdfIn PDF document text
- http://ournextfamilyreunion.com/clients/4/49/491fb30de6d8464ca6518fa43aba5bd5/File/xonem.pdfIn PDF document text
- https://nisahanpin.com/calisma2/files/uploads/29978780396.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b2867d51aee---21029711432.pdfIn PDF document text
- https://ilexgold.com/app/webroot/files/userfiles/files/3102937737.pdfIn PDF document text
- http://bmcnx.com/userfiles/file/bazikamiguxa.pdfIn PDF document text
- http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a43ebb2a78---7669936369.pdfIn PDF document text
- http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9bbp04cipd74u3rssbc6lq4he4/62191042244.pdfIn PDF document text
- https://suma.ca/upload/editor/file/junatav.pdfIn PDF document text
- https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d6b861de553a6a82889910bd975e12ca/barufubovitij.pdfIn PDF document text
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/aab194b24148b62c2c01d6cb0989d5dd/86609596951.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=nursery+nurse+interview+questions+and+answers+2019PDF link annotation
- 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f158.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF158	11144 bytes
SHA-256: `e22af29942f6e46f9e8f91341fa8ab8f1a7d007770366f714dece20b56f1610f`
`font_01_sfnt_off00010b86.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B86	17348 bytes
SHA-256: `816a1d6cfb9e4daf06746b1ec7d0408282c2c52753c118a33f2c4884a4937fe1`
`font_02_sfnt_off00013859.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13859	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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