Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d06ea0c0221b71d…

MALICIOUS

PDF

74.7 KB Created: 2021-09-17 10:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4855f9d5d9aaa556328c22f744f1f01c SHA-1: 5a7d6e49d73b6c909e0953c2669d93bb51fc2b75 SHA-256: 0d06ea0c0221b71dc586ec67a46dd62405a864604d42f7d50ad6441c15c09e68
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to potentially malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://licausi.it/userfiles/files/64245986038.pdf In PDF document text
    • http://poorclarescork.ie/images/jafawulosinimazetaxojo.pdfIn PDF document text
    • https://lensmam.com/userfiles/file/19583721248.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/a2fefbadb2c9b3e399a18941c7495b10/magajobamoxepapo.pdfIn PDF document text
    • https://infrapanel-alegjobbfutes.hu/userfiles/file/kebelikefalaxalalinifom.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/manom.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/jikifito.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/2794043817.pdfIn PDF document text
    • http://ceroki.com/image/files/fogel.pdfIn PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/36660014039.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/bewop.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/komitorizemonorefazek.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__614335FED3BEE.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/3337845854.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/potomedolo.pdfIn PDF document text
    • http://z500.si/files/piwemuferetelozogij.pdfIn PDF document text
    • http://shopabrang.com/images/files/46759418334.pdfIn PDF document text
    • https://ourcampuswindow.com/ckfinder/userfiles/files/91066462975.pdfIn PDF document text
    • http://royalwedding.jp/images/blog/file/bolaz.pdfIn PDF document text
    • http://wgadget.com/file_media/file_image/file/18355134935.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/57669102793.pdfIn PDF document text
    • http://519pf.com/userfiles/files/92388548183.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/161402030eff05---tukumi.pdfIn PDF document text
    • http://freeorden.com/media/file/63459317201.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=review+hp+xiaomi+redmi+note+2PDF 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_off0000c101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC101 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD913 16644 bytes
SHA-256: 2b740e95e39f2a8e52c048d57000bc0c9ef892266fefb4fce5e9ffb2dd3de321
font_02_sfnt_off00010429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10429 10864 bytes
SHA-256: ceba0b5d7754685ffe45f161f04e868363ba31b90cdd3e06aab8b865c97dd61a

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