Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab168e978026a7c5…

MALICIOUS

PDF

106.4 KB Created: 2021-09-16 00:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 03b668410bf153f32cba1f2a7715e918 SHA-1: 51e4888c1a9f80b13feac23d150ae71b0502383e SHA-256: ab168e978026a7c5e62c3c275fce4155bbdbe7f81f8b2fd08be02b3604edd714
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The 'SE_CLICKFIX' heuristic specifically points to social engineering tactics designed to bypass macro restrictions by instructing the user to manually execute commands. The document contains numerous embedded URLs, many of which point to disposable hosting, suggesting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://philabc.ru/uplcv?utm_term=android+10+miracast+not+working PDF link annotation
    • http://seyrimerdin.com/userfiles/file/mufel.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/ronoxukejukebupevuz.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/84873702819.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6567202f9---60110122966.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/laras.pdfIn PDF document text
    • http://synphabase.ch/upload/file/diwobupudotozegubasojop.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/9235012146.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/65712652209.pdfIn PDF document text
    • http://www.77ice.com/upload/files/mitusonivubujopujoxutuze.pdfIn PDF document text
    • http://tubelessons.net/cms_images/file/18440657946.pdfIn PDF document text
    • https://myclubowners.travelenvogue.com/userfiles/files/jigasor.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210909_132236.pdfIn PDF document text
    • https://fasleh.net/Files/files/buzepowiregamejupagu.pdfIn PDF document text
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/61946500506.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/97571631332.pdfIn PDF document text
    • https://gamepinleri.net/calisma2/files/uploads/matuvamojevefekewumazi.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/buxubo.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/tigubim.pdfIn PDF document text
    • http://fsanaq.com/upload/file/2109110204312422523b3tr3nozda6.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/d484c20eccfece2d873553f815758525/buwalowaberepoma.pdfIn PDF document text
    • http://avesta-hmora.boj.se/uploads/userfiles/files/jinawupitibin.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210914_3CC169FBC9687B2C.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_off0001382c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1382C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001503e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1503E 19268 bytes
SHA-256: c48fcd63fa9e5dc8d3e374e66f968fc97c0d772f28f96e1b06015f5ddb2f1185
font_02_sfnt_off000182f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182F8 10868 bytes
SHA-256: 828d86b429ff11d8c2511ebdb4b0352675429539e45db9feb7374129aa0695df