Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc8c6237ea291d6…

MALICIOUS

PDF

83.1 KB Created: 2021-09-20 05:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0081cb4e4bdf970620d6aa851e3ee13f SHA-1: 115aa7e47a0612f516c468ba158b7d5252c16730 SHA-256: bbc8c6237ea291d6571e3a43d9bd4266a00473a3f191dcdde18326e53f3c4a39
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs and is identified as a link farm on disposable hosting, with one URL specifically mentioning a movie download, suggesting a social engineering lure. The presence of PDF_URI and EMBEDDED_URL heuristics indicates the document's intent to redirect users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=manikarnika+tamil+movie+download PDF link annotation
    • http://zhengfutz.com/v15/Upload/file/2021920821141002.pdfIn PDF document text
    • https://thailonghoang.vn/upload/files/28418854373.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/venutimabaxenetijevi.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/78624211496.pdfIn PDF document text
    • https://bdprescription.com/ci/userfiles/files/66527225980.pdfIn PDF document text
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/88281354477.pdfIn PDF document text
    • http://freeski.hu/freeski/file/fanefukotozi.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/5247213048.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/nixiguzadokat.pdfIn PDF document text
    • http://putzlappenborner.at/editor_up/vepafabexokivoz.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614183ce6b642---somisapase.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/sowoxom.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/6896918289.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16145b2ad4cdcf---rotag.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/punufikoparitijelapokef.pdfIn PDF document text
    • http://wxbeimei.cn/upload/ckimg/files/202109120946208615.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/91385789334.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/23195285053.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/85482284446.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60472757277.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/gezewoge.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210914110718_7m7rd6.pdfIn PDF document text
    • https://tonmathunglan.vn/upload/files/89623477256.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/51814664770.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_off0000e10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10A 17484 bytes
SHA-256: c7af58969b5884c83b16f526d09645773587b807a4a09649306bc74075ab83df
font_01_sfnt_off00010e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E89 10480 bytes
SHA-256: a28cca438013e63ad8b48c995a1f79be31d5af0e11b8cd590371ba7f3f77098f
font_02_sfnt_off00012659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12659 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1