Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a6db8221330381…

MALICIOUS

PDF

83.4 KB Created: 2021-09-20 01:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 073bf7699345c6a483404611da79c1a0 SHA-1: 6e7e130dfe3a01e242e0242bcfbf95495b73ae64 SHA-256: 75a6db82213303819e6cd193b771cb258e182c58b9e2a9cc37681ca2992c4c68
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The presence of external URI links and link farm heuristics indicates a primary function of redirecting users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://inwebjor.ru/uplcv?utm_term=the+king+of+fighter+a+2012+apk PDF link annotation
    • http://kammerchor-lindau.com/file/dolebo.pdfIn PDF document text
    • http://trust-law-firm.com/userfiles/file/20210916120610_460680451.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/jumulawepekupavuna.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/78675603145.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/lipawezisewunod.pdfIn PDF document text
    • https://alariel.be/userfiles/file/popibekewezokebe.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf441b8190---wanosopimuvomupilunijum.pdfIn PDF document text
    • http://thietbiytedaibao.com/media/files/jerewu.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/161436b43335ef---faxipaluwimapokufinenekik.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/biselafagotarabibokaguxu.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/83884966549.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/derepupapiluxifobeg.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/nukelapopetufunub.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/14947346354.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143351788857---82333998696.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/bowugire.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210904055524.pdfIn PDF document text
    • https://campermagazine.tv/public/file/79694418498.pdfIn PDF document text
    • https://botroul.be/uploads/59736200314.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/55009825434.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/64351313673.pdfIn PDF document text
    • https://oasis-travel.ro/files/rerodotesajekopupamo.pdfIn PDF document text
    • http://3q1p.com/upload/file/210914043140570376j6p2k1rxmw6t.pdfIn PDF document text
    • http://jfhcoaching.com/userfiles/files/gobovi.pdfIn PDF document text
    • http://www.depomatrial.com/file/nubujomisilasokuv.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_off0000def7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF709 18308 bytes
SHA-256: 956a93668acb6e193086d1e86e6fe22ede5c4aef0976a446ad0189160523859d
font_02_sfnt_off000126b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B0 10772 bytes
SHA-256: 749ec09ac582a1fb280d7089754c4201cd1409c7ddeba9d04dc183e2e41aeaf6

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