Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62bcd23bd0577db…

MALICIOUS

PDF

79.8 KB Created: 2021-09-10 10:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8abe61d85ab6f13a101aced504b7b4f4 SHA-1: a85a25af49c0cbe3bf83dd5be3cd28c1d7bb7c68 SHA-256: c62bcd23bd0577db2f5eafe6955879933b4bf3de490f35f6818b12ac3dcbb485
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains numerous embedded URLs pointing to various domains, suggesting a phishing or scamming attempt. The PDF structure and heuristic firings strongly indicate its purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://catamma.ru/uplcv?utm_term=stream+soccer+games+free PDF link annotation
    • http://evrokomplekt.ru/userfiles/file/93504906085.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/22885058648.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/nopunab.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/51132867723.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/60785012600.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/coec457nhsrpfr9v4rbp753qb4/87761842646.pdfIn PDF document text
    • http://modaxch.com/userfiles/files/36148306780.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/9681729317.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/lesisufarek.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/99890046798.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88541384518.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/56061565779.pdfIn PDF document text
    • https://afgventuregroup.com/cfiles/file/83343099233.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/zobopurin.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/mudewosuratepasikedesaru.pdfIn PDF document text
    • http://inistor.com/ufiles/files/43609071671.pdfIn PDF document text
    • http://syntra.pl/userfiles/file/lewezumiratuforokojinali.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210905233634515.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/mjft1ajc6acvvsfamhh5k4fpqf/90672789324.pdfIn PDF document text
    • https://icnj.net/ckeditor/ckfinder/userfiles/files/piwixuposigi.pdfIn PDF document text
    • http://gomientrung.vn/uploads/image/files/nikebawulonukosur.pdfIn PDF document text
    • http://discus-rus.ru/upl/file/21500376174.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_off0000d4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C3 17240 bytes
SHA-256: aee9c7ad41622ee25b7b0136776de0529915e9d005cb36d233c340b6f451cb84
font_01_sfnt_off000101b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CD 10512 bytes
SHA-256: 47f6d45d18e19c158328888527780914f09cd8c401617bafa04ec08094c720ef

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