Malicious PDF — malware analysis report

Static analysis result for SHA-256 95134e60154b86fb…

MALICIOUS

PDF

78.0 KB Created: 2021-09-19 14:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 268b645324b476a3d384e7e1ad5f15a1 SHA-1: bb56a2805a78fb352bddc2009bcd4fec6c37beb5 SHA-256: 95134e60154b86fb4bf3ca21e6e9b863b8f09fb688b94c96e26bd0fe4f7b5e22
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, with critical heuristic firings indicating it's a phishing trojan. It contains embedded JavaScript and numerous external URIs, many of which point to disposable domains and are likely used to host further malicious content or redirect users. The PDF structure suggests it's designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://maintogelonline2.org/contents/files/mozimevikameravur.pdf In PDF document text
    • https://efsanepin.com/calisma2/files/uploads/sidab.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/ganotetopivuxenisivek.pdfIn PDF document text
    • https://jagominum.com/contents/files/56202808655.pdfIn PDF document text
    • http://alphamarino.kz/images/news/file/pawetusegurotegagemigo.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/mubozeduzenadadab.pdfIn PDF document text
    • https://thic.net/plugin/ce1/ckfinder/userfiles/files/xuxumaxegowirafu.pdfIn PDF document text
    • http://uhorder.com/upload/files/dofapusegelunerad.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/kudadivitatukegozaxisuku.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/74697547683.pdfIn PDF document text
    • http://srtprogetti.eu/userfiles/files/gigadumosatoperijejozati.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/zuforexefosu.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79983800298.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/jezuzizonizuneritefod.pdfIn PDF document text
    • http://khachsanmyngoc.com/upload/files/puluzaketitelelonudorin.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/fazijegegotefogit.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130ace20af92---bilatukolezed.pdfIn PDF document text
    • http://artemon.nl/userfiles/file/wevamefelodimejimuk.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/27101221606.pdfIn PDF document text
    • https://sanghvicranes.com/staging/media/gotelizejudokowonadifu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=28+day+diet+afrikaans+pdfPDF 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_off0000cbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC4 10764 bytes
SHA-256: aa40b93747f6a24af10745b842cdb1ddfda634ac12504328cc434437ff56de03
font_01_sfnt_off0000e4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BF 17788 bytes
SHA-256: 1871211cbbb7872bac40fbfd9bcbf3945923c1b0b95e93a0fa7e640c77122ba6
font_02_sfnt_off0001129f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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