Malicious PDF — malware analysis report

Static analysis result for SHA-256 7367a236c5284bf2…

MALICIOUS

PDF

99.2 KB Created: 2021-09-14 07:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: f478349dcafa647379828478d9a04a56 SHA-1: 6c81e0c1522ed91afd0b7701533b57940d7ba063 SHA-256: 7367a236c5284bf2a8cf5172a66246570fe955425344e2cb9f80a3a8367187d1
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many of which point to potentially malicious domains, suggesting a link farm or phishing lure. The presence of a specific search term in one URL indicates a targeted phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://mientrungland.net/uploads/image/files/gekawerodatonifo.pdf In PDF document text
    • http://nsmpublicschool.org/slbdavbatala/userfiles/file/sutofotadebizuzurejujob.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/wimokake.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/62555618653.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-10/20210910021540538641.pdfIn PDF document text
    • https://hotlinepro.in/admin/userfiles/file/vabulir.pdfIn PDF document text
    • https://sanruouvang.net/images/uploaded/file/52550616186.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/zuxukaxegasadimazu.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/29640237689.pdfIn PDF document text
    • https://er-cardiff.com/eurostyl/photos/file/funemudi.pdfIn PDF document text
    • https://xn--23-6kci4asohe8k.xn--p1ai/userfiles/file/58900103473.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/xugarunobemu.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210909122317_1439261551.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/4878999018.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/wenafajepixux.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/vujimibik.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/gufujefugukawokiziver.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/saluxunibozet.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/vabewonameduj.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210914_056766B231A51690.pdfIn PDF document text
    • https://lombardpruszkow.pl/local/userfiles/file/zirekosovurijubosef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=sonic+mania+android+v8+beta+4+downloadPDF 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_off00011112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11112 23080 bytes
SHA-256: f5cc6d308d73af4f30f0e767c1fa09fb08b1ccc32c134d4c5dcfae862cde4892
font_01_sfnt_off00014dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000165d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165D8 11016 bytes
SHA-256: 6b2b995bc09f0564c4f65dd406a4a3299efc5de4ea9446f9708fbf473fcfa66e

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