Malicious PDF — malware analysis report

Static analysis result for SHA-256 010217dd5895c879…

MALICIOUS

PDF

88.4 KB Created: 2021-09-08 01:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: def6b2e776f39d7187e4603a5f095624 SHA-1: 89582faf2b244f5b991f01a1f4f79aa31d60db3a SHA-256: 010217dd5895c879be37d9453d40d88413e9e70c7562b57cd8a4a6f56f26c7d3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://etyekilovarda.hu/userfiles/file/dazojogowilaxugexojemakuk.pdf In PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bab4fac2474---8673977306.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/90704368557.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609be44a3d218---70616262879.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/mijojonaxono.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/94240128279.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a7397d762---47044657893.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/21765589133.pdfIn PDF document text
    • http://alkanboya.com/files/file///30054861376.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdf68612a6---pexefilugomuxamifidogoj.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/528064228080f05ad1d4b9c47d264f2f/fasixomovesomokepi.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/sijosalali.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/41653879349.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b595fe019fd---8451271880.pdfIn PDF document text
    • https://itacademyindia.com/ckfinder/userfiles/files/saboke.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///bejexipebad.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef4411b9d5---vafogeligurefu.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/79422742640.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/2dff1e42c5d439c4beddea93cf37ac02/12990878813.pdfIn PDF document text
    • http://www.parinet.fi/tiedostot/files/83566853437.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/38890501729.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=mahasweta+devi+imaginary+maps+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E0 18620 bytes
SHA-256: 29b51256ed15131b0b5ddfb42a1a7613382ebd674eace9f02b1a37048b872d86
font_01_sfnt_off0001231a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B31 11036 bytes
SHA-256: a0fd2fd2600b8c769a3aa079f5800a433c6153ffe883ba47b0a502c2f3a46b63

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