Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3004dceea9ef3a…

MALICIOUS

PDF

89.5 KB Created: 2021-06-27 06:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14f19f779a430c2d9120b0ac6365aa97 SHA-1: b3faef5921262dc6b05326e8ea7488d0b8d674f4 SHA-256: 1e3004dceea9ef3a884d060e36d0f04fb383844ff1f2795ff9fe375599caf0c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, identified by heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM'. The ML classifier and ClamAV also flagged this PDF as malicious, with ClamAV specifically identifying it as 'Pdf.Phishing.Trojan'. The embedded URLs are likely used to redirect users to phishing pages or download further 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://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b2229f4b3---34948451408.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f2836892d---sepumamexivebexodumogulo.pdf
    • http://barcabianca.eu/upload/file/16388332693.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e420d0a3a---60973457687.pdf
    • https://ludifrance.fr/userfiles/file/najivaw.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a43512637---35549383353.pdf
    • https://fokusmedia.com/images/uploads/nokunakedotononanokitidew.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/1kh1dfen8bggr70l9mecspoh30/36908753286.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce83371f2b---pixedumigalibovixabaneja.pdf
    • https://qnzar.com/files/jilapizejilaroliriwiwobud.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77fe30286b---98399764398.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e45091816d---17826186253.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/kdubtn9bgg42momghvjs7qv78k/bamadatozitegorilowonin.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb69f18a4f8---99614979881.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3f148b179---31878874769.pdf
    • http://pensjonatagat.pl/userfiles/file/vujuwamazejodizofoz.pdf
    • http://classicalgardenfountains.com/uplds/file/46228269449.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/trmrqkirvt2dk2cqdgetp9sbfs/28944473178.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/fe512542c2c8819f02834b7a11f61f6d/73251213738.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/bg05e8s9bl4rube1kiugs4nlk1/52633230283.pdf
    • http://weddingceremoniesbybev.com/clients/72651/File/28492464011.pdf
    • http://ac-kenigsberg.ru/files/file/rixikolerojavavatubejom.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=4x4+contingency+table
    • 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_off0000f963.bin
1ed7c7d6b0bb943ed5971b30f5f090d62b9d30ec262b7c8bb7fdb09d4a04ed08
pdf-font-stream PDF embedded font (sfnt) at offset 0xF963 10472 bytes
font_01_sfnt_off0001115d.bin
d010aeb9db18b515d7323adda8efeda3ef36b67d05e89fb3370d6c22e5b387df
pdf-font-stream PDF embedded font (sfnt) at offset 0x1115D 17656 bytes
font_02_sfnt_off00013fa0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FA0 16792 bytes