Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb186c9a5b4e2863…

MALICIOUS

PDF

85.0 KB Created: 2021-09-12 15:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 35ac9e77bc0452ff0e8625d440464d6c SHA-1: fc72ebdaf07f9c5fa1a989130ce997e77e611948 SHA-256: bb186c9a5b4e286306a5388254a6515eac08859594058b504e6943928eab9d37
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://irlanc.ru/uplcv?utm_term=gta+5+code+pc+money PDF link annotation
    • http://dinobajka.pl/Upload/file/zovuvakewifagen.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/44315009606.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/mofikimaze.pdfIn PDF document text
    • http://sungwoo-n.com/userfiles/file/gedage.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/34138810245.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/mimaridelojotunomokuna.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/norisixopufada.pdfIn PDF document text
    • https://www.wemservice.com/ckfinder/userfiles/files/jogidewori.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/butomemumazamaje.pdfIn PDF document text
    • https://tjpapigroup3.com/contents/files/40058747120.pdfIn PDF document text
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/47364442545.pdfIn PDF document text
    • http://miyisz.com/mingyi/images/userfiles/file/67707111690.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/wawivizime.pdfIn PDF document text
    • http://explosivedevices.ru/media/file/xexavowuwo.pdfIn PDF document text
    • https://rimi.sk/userfiles/file/16264329786.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/mulifinadimujemo.pdfIn PDF document text
    • http://fivelscope.net/fckimages/17174673351.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/59445942685.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/ruwuwukebobumirujoxorazo.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/fuwanaxapulitipog.pdfIn PDF document text
    • http://villkasz.hu/editor_up/tozofulowomomufepuxido.pdfIn PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/38613462927.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/rovavugamotulidorazanoje.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/14207486966139518dc5bf1.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_off0000e89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89E 10556 bytes
SHA-256: 9a3ea292edb2e7224ba1482f76d4a1fcdd506b50643c8f67166b32a00ac04028
font_01_sfnt_off000100c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C2 17732 bytes
SHA-256: bd6f00ef9e6aaf308396b9066fa137d554cd69c51ded06ee08b165c4f30abb6b
font_02_sfnt_off00012ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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