Malicious PDF — malware analysis report

Static analysis result for SHA-256 916098a1ab9b481b…

MALICIOUS

PDF

70.6 KB Created: 2021-09-17 21:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 89713664abcb15bacb4300a750690919 SHA-1: 748597cf25bfa59ee64d9cca0dfb5fe188c97db1 SHA-256: 916098a1ab9b481b7cccbe13043e01d6141c14a1c4a9e5d741926122ff6d1fde
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://archism.ru/uplcv?utm_term=gba+light+platinum PDF link annotation
    • http://duoctruongxuan.vn/userfiles/image/file/27845896089.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/runapu.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/mejujules.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/jizisalazevavemoxu.pdfIn PDF document text
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/powasefoxovafanu.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/21977694872.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/d03e5ca98777b12b1e3de31fdfb38b99/12229739380.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/14708518460.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/13742262844.pdfIn PDF document text
    • https://dauglita.lt/components/com_mijoshop/opencart/image/data/files/pixubamigolemige.pdfIn PDF document text
    • https://livermore.com/wysiwygfiles/file/93573131962.pdfIn PDF document text
    • https://nhabe.com.vn/ckfinder/userfiles/files/fagajavetafodukibotexozos.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/4646416379.pdfIn PDF document text
    • http://ajeah-intl.org/fck_image/file/2870886028.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/jaxozotebibikodidivoxezov.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/fepesedenos.pdfIn PDF document text
    • http://scea.edu.mn/ckfinder/userfiles/files/xafexawa.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/24099924851.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/21900623126.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/67494049374.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/mumolanutavi.pdfIn PDF document text
    • http://jinyezi.cn/upload/45425522307.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210904_EFA9C2BEC87B3DC8.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_off0000b1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1EB 17172 bytes
SHA-256: ef751e5e0720638aaa6f20bd4d36de8556c3dfd7740cc26939ec68e636721929
font_01_sfnt_off0000de18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62F 10460 bytes
SHA-256: 6b5ccf09c71281991d5f56b86d0bc49a2491148263f23a1c0f9e591cff3d56b0

Open this report in the interactive analyzer, or submit your own file for analysis.