Malicious PDF — malware analysis report

Static analysis result for SHA-256 850daaa43d4bb465…

MALICIOUS

PDF

75.6 KB Created: 2021-09-09 07:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1f1eddba30ca24445e03f388e8b25c97 SHA-1: 8709b0d8f38304d0be4fe40e9f5af07b3601d029 SHA-256: 850daaa43d4bb4659b42ed47eed566b1bbd6b505cb11ca982268efd768ba471f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external sites, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://futuralagoparking.eu/userfiles/files/lokosabikagazajowegifedij.pdf In PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/gepelafewi.pdfIn PDF document text
    • http://koala-al.com/d/files/jogulituvaj.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/gotukomam.pdfIn PDF document text
    • http://edituj.cz/res/file/moxofiboparirixuduj.pdfIn PDF document text
    • http://alkanboya.com/files/file///pafomalu.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/galurupegoxitusesawidaje.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/vusiwujuwopiwugufilakanib.pdfIn PDF document text
    • http://seasonmediagroup.com/pic/file/86770263615.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/97902842491.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/japaduludoxozapazirumuni.pdfIn PDF document text
    • https://avukat.dnsaktif.net/upload/files/83337462222.pdfIn PDF document text
    • https://momentous-inst.com/uploads/image/files/72966149010.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/26175579823.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/83169777970.pdfIn PDF document text
    • http://melvin.cz/data/suzejemeleponaxirelumijuv.pdfIn PDF document text
    • http://debten.net/UserFiles/File/77175479793.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/kakokusujukokafejipokepeg.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210903011533.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16131f50f01145---wixudevumajukozazibeponi.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jotelajifuvorojo.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/mixoweniwodisaxufotuzirex.pdfIn PDF document text
    • http://apcmagon.com/userfiles/2055351600.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=android+app+source+code+extractorPDF 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_off0000c4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BC 16852 bytes
SHA-256: 6efc0483f9410f4f87949aa1185ad900c1474d727f4accbbfbd8318f0ff9ae50
font_01_sfnt_off0000f054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF054 10644 bytes
SHA-256: da848f11c0fc809b0e37f18641a92895861cefebf3b8cbf4fa4831231a8ea6f4
font_02_sfnt_off000108e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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