Malicious PDF — malware analysis report

Static analysis result for SHA-256 01329d486f7c7438…

MALICIOUS

PDF

88.5 KB Created: 2021-07-20 08:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 28b97692e042d9d7a63e377143f59335 SHA-1: 450bb134071ddf25aba3137a1ad31151b3c2adb6 SHA-256: 01329d486f7c74381af7ce0f8b2a23d215cc9dbbb4f6efc496aab4ac1d4209d7
196 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam lure. It contains numerous links to external PDFs, many hosted on compromised websites or disposable domains, suggesting a phishing or scam attempt. The document body is unreadable, but the heuristics strongly indicate a deceptive link farm designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://sjhtractor.com/d/files/menofidom.pdf In PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6a481c2e0---pojokanot.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7dbfc3f870---zesenifigufufuzaz.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/1220523613.pdfIn PDF document text
    • https://centrorevisionimonregalese.it/file/88558012064.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160839d865a4ea---6213055543.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210603031146.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/78803440844.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/novusebupexirad.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/k8v7smr9jne2bkft67jdo8e4m7/79743829646.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1623745781.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/25485434699.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/79335566037.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdecd0607a---29217426932.pdfIn PDF document text
    • http://broadmoor79.com/clients/864886/File/kapaxezirikop.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/rje57jrd74el9ll6eo5tf9ms03/peveduzokojemikajutitado.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/natawaxepuwadapad.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/45287670446.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c42faf332f4---14257887903.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160821af2b2cf0---najakovijojotipuwodifa.pdfIn PDF document text
    • http://sparkpro.lv/content/file/kajapopu.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/52194586453.pdfIn PDF document text
    • http://ahdjcm.com/upload/files/47694791422.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=oxford+bookworms+stage+1+pdf+downloadPDF 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_off0000f57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D96 11244 bytes
SHA-256: 8c55975e8554575ba701cdf03db88dc6dc8509fb8a5067354d63928975594080
font_02_sfnt_off000127b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B3 17276 bytes
SHA-256: 041b3191b040013c2272691094b0a660856e0241127559c537e922d95c521b7f