Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab6b7eb8cfc1158…

MALICIOUS

PDF

82.0 KB Created: 2021-09-17 05:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7b831730c402c5def32cf8b868320318 SHA-1: ab0d9d715479c88f357bbd3306b51dfa0dd607d9 SHA-256: eab6b7eb8cfc1158352835dcf317ffcea20450aa06f62c9a6a9c5f3854a5e295
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the overall structure strongly suggest this document is intended to lead the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326d8546a3d---dajaxagusavifemuneforimu.pdf In PDF document text
    • http://fandimnarodaku.cz/upload/file/9402912727.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/53993231277.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/jaxesediroluvepe.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/migazimuxajuwe.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/96330899462.pdfIn PDF document text
    • http://gymostrov.eu/gymostrov/userfiles/file/novapunesikelizewatowuz.pdfIn PDF document text
    • http://sochisushi.nl/survey/userfiles/files/29081901557.pdfIn PDF document text
    • http://kelsenator.com/userimages/29277733963.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/82548792223.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/66360124252.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/vazakijusojilikoremob.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/22501192604.pdfIn PDF document text
    • http://szwygs.com/upload/22333185346.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/wameratijutimutajar.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090508072689.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/goxerisilida.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/bufadew.pdfIn PDF document text
    • https://sunriseinnjasper.com/nbloom/fckuploads/file/burame.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210901094925.pdfIn PDF document text
    • http://vtaky.sk/media/file/fatuwalirutiwupip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=beiser+modern+physics+pdf+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_off0000d734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD734 18948 bytes
SHA-256: 76d10d249866d6761a8918f6d3878b0c01aac007c883c2f80ff9c61619278f15
font_01_sfnt_off000108cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CD 11040 bytes
SHA-256: 3a81890ab62fd9cb22ad2e178de902fcac32b3f39ba94c2a987ede17dad7744c
font_02_sfnt_off0001225e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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