Malicious PDF — malware analysis report

Static analysis result for SHA-256 1977bd02a3b9e26f…

MALICIOUS

PDF

82.8 KB Created: 2021-09-11 18:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5f824c0c740dcbfb77dd71a37d76c9f5 SHA-1: eaf924bc37eb2f0900db9c5f14ddbc9b26d50676 SHA-256: 1977bd02a3b9e26fe9e168386c499cc840d6a248d029f151ecadfed8e10b8035
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users by providing password instructions for an archive, a common tactic for evading gateway scanning. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware delivery attempt, potentially involving JavaScript execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://holocaustresearch.pl/nowy/photo/file/26084928381.pdf In PDF document text
    • https://listocrm.com/userfiles/files/47548488619.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613022a3c80e6---tizimulamuf.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/wedan.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/sevimebobagepe.pdfIn PDF document text
    • https://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/17710821781.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/zajebedokesi.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/lixoxagojazovapikobatu.pdfIn PDF document text
    • http://fitviewer.biz/files/file/69716446821.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161383752777a1---95728610463.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/debis.pdfIn PDF document text
    • http://hakanhurdacilik.com/userfiles/file/ledisevetago.pdfIn PDF document text
    • http://gewald.ru/content/Files/rononokizemomuduvi.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/serixunibonuvi.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/98998716725.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/lalorila.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-09-10/images/files/wavutigizumudovegulumoz.pdfIn PDF document text
    • http://jadeite.ru/images/file/17000954862.pdfIn PDF document text
    • http://custom-mugs-factory.com/uploadfile/files/95333916770.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/genapidetovudoxadefo.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/lodidaba.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/56419353166.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/damugogaxisabobexibolu.pdfIn PDF document text
    • http://way-of-spirit.ru/upload/file/20083054625.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+know+wifi+password+in+android+without+rootPDF 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_off0000dd3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3D 18248 bytes
SHA-256: a90125c649ca5ab4be74921714fcc04a641e17dae87e263c74642d3ada3295e2
font_01_sfnt_off00010ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCF 10684 bytes
SHA-256: 74a17e378992e1330e7f5ec8ab82aaf0612c64ca17268220fe4b420f6370eebf
font_02_sfnt_off00012546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12546 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1