Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34faa988438a2c2…

MALICIOUS

PDF

83.4 KB Created: 2021-09-21 00:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 431603a9a36d930440efede71e3e918c SHA-1: 516974a10bc0fe66cfe3e288ca71e2b952656938 SHA-256: e34faa988438a2c25dfc7b915e89a44a456e788b0edb31417341f9f3b53e947c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics indicate the document functions as a link farm, with numerous embedded URLs pointing to potentially malicious sites. The 'Urgency / deadline lure' heuristic suggests a phishing pretext, aiming to trick users into clicking the links.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://huntic.ru/uplcv?utm_term=dazz+cam+android PDF link annotation
    • https://essuances.com/ckfinder/userfiles/files/66019847993.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/18988794274.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/fazana.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/userfiles/file/xarafimigekat.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/44977124372.pdfIn PDF document text
    • http://108shiva.com/userfiles/file/In PDF document text
    • https://dudikom.pl/userfiles/file/8539381605.pdfIn PDF document text
    • http://chukysovin.com/img-svc/files/60909134583.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/81478556540.pdfIn PDF document text
    • http://colokit.thienlonggroup.com/Images_upload/files/dadote.pdfIn PDF document text
    • http://gewald.ru/content/Files/modajakixida.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/rexuw.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/xenoniwukivaruki.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/jebapikudasesajikosu.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/15646670988.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210921_A739EB280DCC010F.pdfIn PDF document text
    • http://swancentive.com/cote_dor_import/admin/ckfinder/userfiles/files/jaximumoxisinavizuk.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/vuvaloxudajinukadowivusan.pdfIn PDF document text
    • https://escolaalfa.com/userfiles/file/74462212736.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/pilirevobofumiwiraf.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/netad.pdfIn PDF document text
    • http://otestmanager.org/club/data/userfiles/file/20210920190829.pdfIn PDF document text
    • http://mylodge-naoshima.com/5928765789.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/vonulivek.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_off0000de4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4E 19380 bytes
SHA-256: c05599ab376446c769dca5b57069e1837672f527a3f59bb6ff999bb3eff84521
font_01_sfnt_off0001116d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12984 10148 bytes
SHA-256: 4d533bf1c23582503b25dccac1bc557380df4fe74b610401251a1c840a1105b3

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