Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97d1576a954ce31…

MALICIOUS

PDF

81.0 KB Created: 2021-09-23 05:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ebd3bc2aecb0a90ab765374ee12cc170 SHA-1: bdd38585f3884928c0424ace435e2393e8af3148 SHA-256: e97d1576a954ce31b4191b33320da5954d7146500beea70ff7d07348103be6c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=birthday+calendar+app PDF link annotation
    • https://jordanadams.com/ckfinder/userfiles/files/vivinelewute.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210921_C4DF5F17D0B5975E.pdfIn PDF document text
    • http://vetcarefoundation.org/userfiles/file/wuwiwukubevipin.pdfIn PDF document text
    • http://sky1981.com/asset/uploads/files/28132809669.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/46239514279.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/16112067767.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/79962458456.pdfIn PDF document text
    • http://audyt.rowerowaszkola.pl/imgturysta/files/60929923452.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0f014deee---79843616868.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/nobixovoxibaribuneteverud.pdfIn PDF document text
    • https://www.e-oswiata.olesnica.pl/ckfinder/userfiles/files/jenapagisire.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/161486281548c3---2346595681.pdfIn PDF document text
    • http://artc-polymers.com/upload/images/files/56582620765.pdfIn PDF document text
    • http://myphamasia.net/upload/files/fafewofoxadizup.pdfIn PDF document text
    • https://listapp.in/ci/userfiles/files/9790277907.pdfIn PDF document text
    • http://epilia.com/upload/FCKEditorfile/xufevedimoroz.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/silojodu.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133dba6275e3---giriraxomorafakisobudapox.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/18075968955.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/basisevagozakodorudeduz.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/26977904870.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/vexunodifij.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/7195014773.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/nilerakikozakusir.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_off0000d95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95E 17716 bytes
SHA-256: 69438deb3b20fa9de6132f3c31ba4523a6ade50bbd9b76aa60f8481b7ad03a46
font_01_sfnt_off000106f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0B 10488 bytes
SHA-256: ff5cc847cc4b5e21b863fbc4725d077e05f4384d50e0a1bb42fcbc9fe3e701e7