Malicious PDF — malware analysis report

Static analysis result for SHA-256 467e1aedcfbb5755…

MALICIOUS

PDF

71.8 KB Created: 2021-09-19 02:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8dc4c77de1fb31b06f67b29bcd844bb2 SHA-1: 7b008734b1f2b58040d5f06514d4526fca4f4798 SHA-256: 467e1aedcfbb5755ee52e5c193139c30d0b266445302f49e908541a786b27644
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains a link farm pointing to multiple compromised WordPress sites, which host PDF files. These links are likely intended to redirect users to malicious content, such as phishing pages or malware downloads. No scripts were extracted, but the structure suggests a malicious document designed to exploit user interaction with embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e879a0beab---47275145553.pdf
    • http://ptairsupply.com/userfiles/file/35289014873.pdf
    • http://manilag.com/FileData/ckfinder/files/20210908_0E8E1CBB6156968C.pdf
    • http://nujhimachal.in/img/uploads/files/69878325643.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16134c02b43b02---ripun.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161313ce629d24---mudisewuguvewubemisiw.pdf
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/58424028111.pdf
    • https://lodoshosting.com/calisma2/files/uploads/tizalosaw.pdf
    • https://questyme.ca/userfiles/file/63601140679.pdf
    • http://artecgroupservices.com/imagenes/file/83966352476.pdf
    • https://airxps.com/userfiles/files/xuripubid.pdf
    • http://songhakbbq.com/uploads/files/nabixupi.pdf
    • https://xn--pssa17sw71b.tw/upimages/files/ladujirilabigakipa.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142338d10615---75261331188.pdf
    • http://scandinavia-ex.com/images/blog/file/73872815480.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/no3sbkq7h61hr2d25bvbbvv0p3/74919373643.pdf
    • https://pr-dienst.ch/file/35098856872.pdf
    • https://pearproperties.in/userfiles/file/pagizulatakiwofetoli.pdf
    • http://eastcoastbiker.de/sites/default/files/file/xawilutufavirenofafodiv.pdf
    • https://linkevicius.com/upload/galery/file/sonuwoli.pdf
    • http://cleangroupbd.com/ck/upload/files/34343125941.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=android+wifi+has+no+internet+access
    • 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_off0000b8a7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A7 16792 bytes
font_01_sfnt_off0000d0b9.bin
7b2067f5143cf104145b89c75fe2e641c7aa753860a9331a15398570b148cc6c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B9 15948 bytes
font_02_sfnt_off0000f9a1.bin
f112337cee559655381947656af5a8fe83fdd6c7014adc9d5e8cc08026bf92d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A1 10596 bytes