Malicious PDF — malware analysis report

Static analysis result for SHA-256 00717fd32113aa52…

MALICIOUS

PDF

88.2 KB Created: 2021-06-26 10:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a031ac4c9ffdd764514bdaa8024059f SHA-1: 97e36650ebcf221d290096115ba79c9e2edc7265 SHA-256: 00717fd32113aa52db9301b6be3a182c00421e070a5e0739fd368968f2e1e78d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and link farm nature are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zdrowejaja.com/Upload/file/2300624065.pdf
    • http://bogelaipigeon.com/upload/file/mozefenofux.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e7f66394b---26757936263.pdf
    • http://learningkey.org/userfiles/jenoloxixizadaperij.pdf
    • http://usmleworkout.com/files/file/11742133596.pdf
    • http://www.kammerpop.de/files/file/34015580224.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb88da839e---67039047237.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/75dd766680ddb06a0f066632dcfa65c7/24303347331.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/5e4651756d84317299823735c661d164/patazitudenakaresitab.pdf
    • http://ahcxdq.com/uploads/file/011756048488.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/227a1e56526599bcf935a6623c60b5c7/gadotut.pdf
    • http://www.awakohchang.com/image/upload/File/ipuwukufozib.pdf
    • https://nadamasristorante.it/file/maredino.pdf
    • http://szwygs.com/upload/ziwosonimuruminunatepa.pdf
    • http://geotersrl.it/file/3177645324.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9a1f7f3f0---jikozesudavejarudal.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/rcpfm3j3v1d776v410pdi0n28c/52941501457.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/g5t27lujmmur97oc73e33dk8g9/fopur.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2047551cdb---xumitomulekirasezuxo.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608631080273f---vajarifojokoxagokebevov.pdf
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/neganimekugo.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/99e7ebad9fdfa2138f32fd8409d019d0/63426617271.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=storing+homemade+croutons
    • 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_off0000ef30.bin
f945c0e1ac35966549d96da3efb560c193598bc6c49b5c6dec4ec800fb957d95
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 10944 bytes
font_01_sfnt_off0001081e.bin
d72f08259cf952d7b42ab392f691ef06fc4c2ec61b346a8a1911c50f44cc2f4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1081E 20140 bytes
font_02_sfnt_off00013b9d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B9D 16792 bytes