Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ccc7f51e52da13…

MALICIOUS

PDF

77.9 KB Created: 2021-07-01 12:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0faaecedebea62aa426882570a38fe7d SHA-1: 48629b7eabbeef4a6ee476edd8a4082c125c239d SHA-256: 01ccc7f51e52da13b4ccb6f010e7baccef4860a5852b18fdb7b2054d3c4a42a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that form a link farm, with many pointing to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns suggest this document is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

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://metamorfoza-krosno.pl/userfiles/file/waxex.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/stuucrvm9hgh9aagtf33fi8cg5/xukagexunenuvod.pdf
    • http://phanphoiongnhuahoasen.vn/upload/files/jetiroxaruzuwewixiru.pdf
    • http://df-2.de/images/daten/file/49944078700.pdf
    • http://nacyc.jp/Upload/file/94818030771.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2db809219adab4c800c5e695d4f70e47/58940898726.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4f1870e40---gofepe.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcdcbae50b---74355908394.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/3a0cbdd4850e402388a6bb9f6a4eb53f/78929350186.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/tmp/gojozipuretafuvoxi.pdf
    • http://taxicityplus.ru/userfiles/file/57563360994.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbacacfdd9---posiv.pdf
    • http://zpb-maciejewski.pl/upload/fck/file/26069454545.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/5a7a1dcedd50921bb5c3a8fcfad0e46c/16449071965.pdf
    • http://dharmapremipariwar.org/userfiles/file/lebediritulizuv.pdf
    • http://usmleworkout.com/files/file/fegagobunugi.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/5a02e41b463d3267f686d0aa92d94d89/bifawonobiguzowov.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609211d7c48ce---71595157047.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7cc69a876---4858500794.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b474e941c4b---jenobevepepumugijigovorub.pdf
    • https://groupunsur4.com/contents//files/68271048047.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/sibi82ckrg31ql8j3jd226h230/pibomugefirogawofupiwegeb.pdf
    • http://rocb-ap.org/file_media/file_image/file/46119892454.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c266655aa---98571778673.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a68dcc545---geboverevunotobijupis.pdf
    • https://vydavatelstvoklett.sk/userfiles/file/losabuxupisuziriwox.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=removing+bathtub+faucet+without+screw
    • 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_off0000cdcd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCD 16792 bytes
font_01_sfnt_off0000e5df.bin
7fc9317fea680ce9c2389dd85e536a484ce7cd698d3cd8ef5ba222513b5e9b37
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DF 16280 bytes
font_02_sfnt_off00010fff.bin
e24b330714e503f9e16f18e0bbd84eeebb5ccb2b81e3fa97d7ab7efa19a86ba6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFF 11176 bytes