Malicious PDF — malware analysis report

Static analysis result for SHA-256 126eac95fb53890a…

MALICIOUS

PDF

74.8 KB Created: 2021-09-15 10:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: af77646ba173cb71126c4e2013f8d6a7 SHA-1: 4cde3cc463b84d99982d1a0e66acaf14597a042f SHA-256: 126eac95fb53890a4b9a646d596549ecc9ad053aa6f3a75e80395bccf8424828
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which are structured as link farms, suggesting an attempt to direct users to potentially harmful content or downloads. The presence of 'utm_term=download+cover+fire+mod+apk' in one of the URLs strongly suggests a lure for downloading modified application files, a common tactic in phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://ketchas.ru/uplcv?utm_term=download+cover+fire+mod+apk PDF link annotation
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/51697442818.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/xewajatoxarafififotow.pdfIn PDF document text
    • https://thefertilizerproductionline.com/d/files/buwazomakif.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/tuzabidewasixokaz.pdfIn PDF document text
    • http://www.tecnologycenter.com/admin/uploaded/fck/file/52408982317.pdfIn PDF document text
    • https://1000families.eu/userfiles/file/pewuxomele.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/ronotafuwijapobigitunu.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/32312115555.pdfIn PDF document text
    • http://partnercable.hu/files/viwozuresakagebivowuji.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/1128072640.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/25458692940.pdfIn PDF document text
    • http://abwva.com/uploads/files/14800600621.pdfIn PDF document text
    • http://firegallery.ru/img/upload/69511553344.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/55830084055.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/96691503727.pdfIn PDF document text
    • http://hjhchem.com/upload/files/pezofemat.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/93682069211.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/46816435952.pdfIn PDF document text
    • http://dakdekkersindex.nl/images/uploads/pevozewolologe.pdfIn PDF document text
    • http://guchen.ru/d/files/74387017250.pdfIn PDF document text
    • http://pi-consulting.ch/download/53824722890.pdfIn PDF document text
    • https://shidoremicrosys.com/media/rabegofilove.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_off0000c200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC200 10760 bytes
SHA-256: e2eebc6dd8086138b209a4fecb2b3a754e70a4c30d171ec99dab32eb6a4696bb
font_01_sfnt_off0000dabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D1 16792 bytes
SHA-256: 3ec8bf85fd32624d3e51df2007b7fd16b561b2ddee1edcf993e470860b20b3ac

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