Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3106ea13aa696f…

MALICIOUS

PDF

82.2 KB Created: 2021-09-12 03:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a4f69e28d4db24e772e1635f79386d72 SHA-1: 1cde7159a67c7f6033061416d716d03395d1c045 SHA-256: 0a3106ea13aa696f6b8f75b03bd35858592ee5ed79e66df47bb915e3d3e38ca4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many of which point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The presence of 'utm_term=power director pro download apk' in one URL indicates a lure for potentially unwanted software. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bjsddesign.com/filespath/files/20210907060636.pdf In PDF document text
    • http://dzbnf.com/upload/file///72951548313.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/robog.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1613c674e43d46---xexizowifoj.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/jijelijuxububemakakoj.pdfIn PDF document text
    • https://alebusph.centralcms.cloud/galeria/files/fatipebepakuxosofimikaz.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021091207353667.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/buvuweberudizizik.pdfIn PDF document text
    • https://siangyun.com/upfiles/editor/files/fesuwi.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1e7d48d31---xomuje.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/23017581355.pdfIn PDF document text
    • http://lawyermo.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16569402912.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b292d8a2ce---86302649424.pdfIn PDF document text
    • https://grandhotelushba.com/userfiles/file/95425754508.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/44002182460.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/302021e56018cdf8e429c5871155bd02/mezosipefokawo.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/bomok.pdfIn PDF document text
    • http://yuha.be/_files/file/zatosixemoparolukewef.pdfIn PDF document text
    • https://floridahouselottery.com/test/userfiles/file/rifutum.pdfIn PDF document text
    • http://optometrystaprzemysl.pl/userfiles/file/69391971412.pdfIn PDF document text
    • http://generaldistco.com/images/file/87338312041.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/6982528094.pdfIn PDF document text
    • http://oipipleszno.pl/userfiles/file/nekarimiwu.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/vegomubavota.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/linijumerijixo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=power+director+pro+download+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_off0000de2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2E 17060 bytes
SHA-256: 25eaa67320ec429aaabf81d3e1889d7ee4d0ff692c233804659969ad793126fd
font_01_sfnt_off00010a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A92 10520 bytes
SHA-256: b585f2f3745b639b3577e48826ceab9b8af7dd9ccd3144bf7734f678eb4d0322
font_02_sfnt_off000122ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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