Malicious PDF — malware analysis report

Static analysis result for SHA-256 62beb67c9035a5e8…

MALICIOUS

PDF

70.9 KB Created: 2021-10-03 16:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 99e4bb75070d5a91725d48a4dd146bff SHA-1: ea7943832069b7c02b78648e5c54006114f51c4f SHA-256: 62beb67c9035a5e8969368c2087faecb31464fc2565888213c95cba78b691ad9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting and are likely used for phishing or distributing further malware. The PDF structure and the presence of external URIs strongly suggest an attempt to lure the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://inwebjor.ru/uplcv?utm_term=autotrophs+get+energy+from PDF link annotation
    • http://euro-ex.com/images/blog/file/fusigefediburelive.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/pawotuxomiwakewos.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/22147804848.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328f3a35f15---nevebotobizavuruwes.pdfIn PDF document text
    • http://telesson.net/_UploadFile/Images/file/51218345322.pdfIn PDF document text
    • http://htygroup.com/upload/files/7121446361.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/zekivilojureperolu.pdfIn PDF document text
    • http://shop-cartuning.com/userfiles/file/lezezituzevobemitedil.pdfIn PDF document text
    • http://serenetour.com/image/upload/File/leguwidawodizif.pdfIn PDF document text
    • https://simbhaolipower.com/images/file/depiligigulegom.pdfIn PDF document text
    • https://bharatceramics.in/ckfinder/userfiles/files/82723163930.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/91853848752.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/83845324342.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/4685089872.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/60705139429.pdfIn PDF document text
    • http://palami.by/images/file/ruwepojove.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/piwagemagolati.pdfIn PDF document text
    • http://sjzhtchem.com/upload/files/pavizafibenesinijuluf.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/baxim.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/56922228171.pdfIn PDF document text
    • http://wamaeassociates.com/images/uploads/originals/file/mubozatezilipipulor.pdfIn PDF document text
    • http://kooijobs.in/ckfinder/userfiles/files/19630901698.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_off0000b183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB183 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99A 10700 bytes
SHA-256: 11254bb726074431ec8c5b6e8fe606c0f6d4fb189e69268570b82c2992a759c4
font_02_sfnt_off0000e20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20C 17424 bytes
SHA-256: 6cb333a8b970fc8702887791f04c324b68277690ca86401c96ebf102b56a1c77