Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e477093d1fd7c1e…

MALICIOUS

PDF

91.7 KB Created: 2021-08-02 03:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9055c82fe19c157894e6dba3626987d SHA-1: d9d85db77759300ce03c5a4a1fa87543b29be3b9 SHA-256: 1e477093d1fd7c1e9441bd62c2aee47945e4525576520e96c9d03442b225f0be
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of an IP address literal in a URI further increases suspicion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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 http://teifsepahan.com/files/file/jeburawefobilavogowe.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/16620191622c11abfc365f561ce0ab8e/38116106896.pdf
    • http://angelofthewinds.net/ckfinder/userfiles/files/58757723749.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a194e401a6---2944068172.pdf
    • http://atdawnwelift.com/userfiles/file/42806854562.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/1921b50f02206c3456bd5a1f5f155287/48911788209.pdf
    • http://artospace.com/pics/file/74864117775.pdf
    • https://andrejc.si/files/file/50814897579.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607482c8cbd18---mitemogu.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a8cf94cb1---munoderiwitusejevadonono.pdf
    • http://140.121.125.49/ckfinder/userfiles/files/20210726_193713.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2ec70109c---zafejazelurobewoga.pdf
    • http://atol-res.pl/uploads/file/93277138076.pdf
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/15652443082.pdf
    • https://chetanaus.org/bheru/uploadfiles/file/ruwojapirumelim.pdf
    • http://kingalbertltd.com/uploadedfiles/file/wuwadazeleluba.pdf
    • http://land89.com/ckupload/files/ritoxalopofupurezi.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803b00c859b---fekosujiwegetamuzisojeder.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f84d895e84---69590772987.pdf
    • http://thebrownbag.vn/upload/files/39113039555.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a079b916aaa---rejolubesadelub.pdf
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/69315371715.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/8d31e262aeab563d0d698fafb469a061/lebofozutodakujevoripad.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2a20881c1---fudasakivire.pdf
    • http://chiari-web.com/ckfinder/optimist/files/lesabebij.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/6c6b19ud1i20jukhvie3euf93q/11056972790.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+do+u+make+the+blood+gang+sign
    • 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_off0000fe35.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE35 16792 bytes
font_01_sfnt_off0001164c.bin
13fb86bfe4c156c8bce7b61b2605eec12cb85ed368d44bbd7ba8da73cb5e3bff
pdf-font-stream PDF embedded font (sfnt) at offset 0x1164C 11004 bytes
font_02_sfnt_off00012f71.bin
dbc9b91fec90662191f9a72d13eb8b89fc75cfa7a21fe8b9ae17a6dd09ae3025
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F71 17780 bytes