Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3201228edc6fa19…

MALICIOUS

PDF

79.9 KB Created: 2021-09-13 06:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 5576fb093f36b6144f0312aea30ccb14 SHA-1: dcb8c1ad16bb1d1996670513063d9c069ea0a73a SHA-256: a3201228edc6fa195fcf9416c2579500c6d6c9d3cd547bad5a9a4659418de08d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs and a heuristic firing for a 'download button' lure, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of multiple external links and the overall detection profile point towards a malicious document designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/duvawakoxovuse.pdf In PDF document text
    • http://aaaexpressheating.com/userfiles/file/62570655788.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/30258318459.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136a22651598---21123473654.pdfIn PDF document text
    • http://objets.immoweiss.lu/userfiles/files/nivogek.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/23581179767.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/2905362843.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/lozurapinafikomemoki.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/88675779882.pdfIn PDF document text
    • http://mc-opony.pl/files/file/87209827346.pdfIn PDF document text
    • https://farsiherbal.com/cache/fck_files/file/5917993396.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/69399556035.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20210910134416.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/22335069546.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/70175219473.pdfIn PDF document text
    • http://santeh.md/img/files/15415937885.pdfIn PDF document text
    • http://huabulaw.com/uploadpic/2021-9/file/2021090809471073499.pdfIn PDF document text
    • http://kaus21.com/userData/board/file/42220501124.pdfIn PDF document text
    • http://neuchina.org/userfiles/file/kixavuxemep.pdfIn PDF document text
    • http://abnigakgdsg.friendship-match.com/upload/files/wegawalutukidugofapomaro.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/14825855480.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=song+player+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_off0000d6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF00 16848 bytes
SHA-256: 9d7bbdef73a38fd54d46c85e855f605e1ba8716f900188e46d74fae63fade3cc
font_02_sfnt_off00011abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABD 10348 bytes
SHA-256: 5cf6c82ed89b1ada54cf3d0a81bdd6c5e3a1eea78746b633ebc59d73d14a9411

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