Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5fd1fa6949dbfe8…

MALICIOUS

PDF

82.8 KB Created: 2021-09-13 12:36:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9bad801ac2871254c2a4b75566692c8d SHA-1: 489c492821db6b21d8f9f091f121fa6dc2480d50 SHA-256: d5fd1fa6949dbfe8b0f78d9d5bccb5cf912ed54385e7363f3146c4e47b0301bf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged as a link farm, indicating a malicious intent to redirect users to potentially harmful sites. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://madeirashopping.com/userfiles/file/xokobumudazowivap.pdf In PDF document text
    • https://pmapmc.com/userfiles/image/files/10872766915.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/163133092799774002616.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/90107481293.pdfIn PDF document text
    • http://lohoithaiduong.com/uploads/files/84127406628.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///tuzanomefurixel.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/37258265474.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/161310891705e8---kesaretipibi.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/92679706847.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/62455124081.pdfIn PDF document text
    • http://gardatrans.com/content/Files/devowof.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/17806703707.pdfIn PDF document text
    • http://studioaeditecne.it/userfiles/file/57314960019.pdfIn PDF document text
    • http://robbes.nl/media/files/55676348300.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/58846272115.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/73682868370.pdfIn PDF document text
    • http://srcchaika.ru/files/uploads/files/xavuvimefixijipodapokavo.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/24745289632.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/duxudo.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/mimazobatazijolusodid.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/57764159660.pdfIn PDF document text
    • http://syntrend.critical.tw/upload/files/waritakit.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/ligunadatanitila.pdfIn PDF document text
    • http://studioferrato.it/userfiles/files/diwipepomopefadamopafanil.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/66330477330.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=netguard+no+root+firewall+apkPDF 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_off0000dbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FB 10760 bytes
SHA-256: 729c70efb16bcfcaede9b7b09c1c11d5998901ac52b95529166686bfaf1e9c82
font_02_sfnt_off00010cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB1 18560 bytes
SHA-256: ad4560e6b0564ce28a87db65e0ee90344c6c849824ae08cb8ce00e20f25ce1f2

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