Malicious PDF — malware analysis report

Static analysis result for SHA-256 406908f4dc382c85…

MALICIOUS

PDF

78.5 KB Created: 2021-09-13 09:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 58a3d4d0a14aafc6375d7c5792bd11a2 SHA-1: b4a241dd48ebf3a748ba5582ad60dab346dc6aa4 SHA-256: 406908f4dc382c859a4e92eec60310b5bd9eabeb6ed77968b172dd70805e3287
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to various domains, suggesting a link farm designed to redirect users. The presence of PRC/3D content and duplicate object bodies are common obfuscation techniques in malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://uitvaartverzorgingsindex.nl/images/uploads/zusikezomeduwonimuxul.pdf In PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/2824315922.pdfIn PDF document text
    • http://gzmzwl.com/Uploadfiles/files/57025551845.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/getusafogal.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/74372966602.pdfIn PDF document text
    • http://islaminkiel.de/webmisr/uploadwebmisr/file/kedeguzofuwufe.pdfIn PDF document text
    • http://orlickachata.cz/files/files/gefaxapemujatuk.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/65930516320.pdfIn PDF document text
    • http://www.depomatrial.com/file/94045920348.pdfIn PDF document text
    • http://kantipursecurity.com/userfiles/file/52257987326.pdfIn PDF document text
    • http://saddabro.com/userfiles/file/xavumisesorezafe.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/88032106420.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/wunuzipukoken.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/vetefitulogekesilasi.pdfIn PDF document text
    • https://armature.ir/cache/fck_files/file/94106080126.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/mugosa.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/viroduf.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/1821714fab6f602a3c400f4793f6e437.pdfIn PDF document text
    • https://lekkermooi.nl/userfiles/file/getiwopi.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/302021e56018cdf8e429c5871155bd02/mezosipefokawo.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/1202591709.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=compound+bar+graph+geographyPDF 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_off0000d026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD026 16792 bytes
SHA-256: 64471cdd7397a0401203f391b635b8bed9b14ee7164e3c96227f400c8e7b2eff
font_01_sfnt_off0000fc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11425 10820 bytes
SHA-256: 698e616088b8cd2402ad5a08254f38939bea395a472da1354d2624fbe1451ca2

Open this report in the interactive analyzer, or submit your own file for analysis.