Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d32a6bf61205e16…

MALICIOUS

PDF

81.4 KB Created: 2021-09-13 06:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3e29086a08afbefabc68723d9f2279c9 SHA-1: 87d2d99b5e3859f41040a4ba795713b35d03ea0b SHA-256: 0d32a6bf61205e1645e33919b861dc87ae442b28724f00fe206b29513f585fcc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The embedded URLs point to suspicious domains, reinforcing the phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://smidgel.ru/uplcv?utm_term=mx+player+pro+android+1 PDF link annotation
    • http://unite-chem.cn/upload/files/paribelitekexenozi.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/konexujug.pdfIn PDF document text
    • http://slsnn.ru/content/files/28862441897.pdfIn PDF document text
    • http://terralis.net/catalogue_dynamique/file/21973668600.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/t2u1tk4o91fgcbqnuh0bmr9td3/voxezasepomubazubisu.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/22046765654.pdfIn PDF document text
    • http://jatechkj.pl/upload/fck/file/ralulunafumabosalo.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/jakajedeziwosijadevagif.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/9531396543.pdfIn PDF document text
    • http://ministerium.pt/files/nabafa.pdfIn PDF document text
    • https://jdrum-music.com/uploads/ckfiles/files/vomulosegisoguvovegofeb.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210913082440.pdfIn PDF document text
    • http://josquin-capella.de/download/tadufadap.pdfIn PDF document text
    • http://kowalstwwo.pl/public/cms/images/file/96656285477.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/baxokefibos.pdfIn PDF document text
    • http://www.ciesol.com/ckfinder/userfiles/files/37157986498.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/togetelonutukimul.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/bisasedojiboxirakib.pdfIn PDF document text
    • http://giteduguedesboires.com/userfiles/file/35459732082.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/xuxaxozobegitisajiporide.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/satizudemibupebexa.pdfIn PDF document text
    • http://kleiberit.ru/files/file/43470901874.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2fc04e2ca---vedosesenazerulewe.pdfIn PDF document text
    • 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_off0000d9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CE 18004 bytes
SHA-256: ffb21f4fb42cafbb58f23feafe6fd4a7d336a943b39b206042e7ecfe76db9312
font_02_sfnt_off00012047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12047 10380 bytes
SHA-256: c5e312b88bd9ee28dcaf1269fe52c2f5c8277e4b6f36ce57f7b1ece6aba0d84d

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