Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd0131a0ea0e675…

MALICIOUS

PDF

101.7 KB Created: 2021-08-11 20:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: b623b8278b1f0109cf09b714f378a16b SHA-1: 69f0cdf01a5167419bb004c288deb9a0bba16db1 SHA-256: 1dd0131a0ea0e675509f1bdab687136884ab5c59e0112778b48f8ced3116d42a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to domains that appear to be compromised or disposable. These links likely serve as a lure to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://sumosushingrill.com/uploads/files/67236153729.pdf In PDF document text
    • https://mimpi1pusat.com/contents//files/tegiduberimibapopofo.pdfIn PDF document text
    • http://okulsanmalatya.com/imgup/file/3122635191.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/22482044335.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/novulibapuzeme.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a66c2c6696b---29904467747.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/zilalowunudotopepinimiduw.pdfIn PDF document text
    • http://rulada.by/upload/editor/files/24667555850.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/bonomopefigola.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/fawamivilavi.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/sinaxarilekuliditeno.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/15909882620.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160de168965641---83317152300.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/f8b828a08edff0a99fbfc92e51e91697/kifital.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/motozolederupemefale.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/dagorutomigaribixubuk.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075c1cc8aacc---tikomidarere.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e7572ce0c---bixukilebunobif.pdfIn PDF document text
    • https://taxiporec.top/wp-content/plugins/super-forms/uploads/php/files/c5bimjos63ejqktln2ok8o72pg/rosodidabesipar.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/80748534889.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/99047956818.pdfIn PDF document text
    • https://autopratichesas.it/file/57742594740.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=velocidade+da+luz+em+kilometros+por+horaPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13501 10896 bytes
SHA-256: 6dc18907ffd50ec7a510f126d47946f924c40281058cd9c06c6a16123fa20adc
font_02_sfnt_off00014e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E44 21908 bytes
SHA-256: e20ca901ac2de416a70e264e942c7cd3dadf32a343cf76f768ca6cab4ca02e72

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