Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb0f2ca30bc27f2…

MALICIOUS

PDF

83.4 KB Created: 2021-09-20 02:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0a7ec2b7cfb10be24e5e62ec892d6e1d SHA-1: a5ff80265ca8b26918ab2d0efb4993b98f752d84 SHA-256: 7fb0f2ca30bc27f20565105340ae0a5ac6d93db4dd1624385d1be3c090351be7
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to websites hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://khojedu.net/userfiles/file/kikogamavezafafosowafov.pdf In PDF document text
    • http://unseretochter.com/images/file/zobalevovuzepuwopegufa.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/69092354324.pdfIn PDF document text
    • http://elitvorota.ru/f/file/sezanaledopexedima.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2e5fbbcf392fc26f2e4a4a3829e34af7/salevelobo.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/fofivoji.pdfIn PDF document text
    • http://keralastatetailorsassociation.com/userfiles/file/wubetujoderujeboro.pdfIn PDF document text
    • http://toszegisuli.hu/userfiles/file/80804185458.pdfIn PDF document text
    • https://groupunsur1.com/contents/files/lukupegazafipobo.pdfIn PDF document text
    • http://liqaa-lb.com/files/userfiles/files/55466403738.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1630657303.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/72bd15e32527c39ddb93bf2a8ea801fa/funuxufobumunen.pdfIn PDF document text
    • https://olterus.net/contents/files/maxan.pdfIn PDF document text
    • http://planbmedia.hu/files/wazerimiteb.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/disujagixegobuxis.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/wugeterupaben.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/bujaruvagowijowejomun.pdfIn PDF document text
    • http://centrons.com/uploaded/file/10855419696139eb64e66ee.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147b2299846b---28064169648.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/10294271132.pdfIn PDF document text
    • https://cyklo-wellness-penzion-palice.cz/content/52217835346.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/91701772761.pdfIn PDF document text
    • http://edmo-cars.nl/images/file/71533542741.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=dragon+ball+z+season+3+episode+28PDF 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_off0000daeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF302 11168 bytes
SHA-256: 61f485a401e9b0d595fb385d74b03f161d6829f6b975f506b52453544686322c
font_02_sfnt_off00010cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD9 20244 bytes
SHA-256: 0ca5b2cde64e67abc19612c1ae382de7f3c1828678d9e5c98ec827f05e0741a8