Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e77e30b74992af…

MALICIOUS

PDF

88.8 KB Created: 2021-09-20 07:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 70558993cc0d295e307ba2fe9afcac72 SHA-1: 1e3dbd3972b19d327886f6e3a38fd8e9171b8396 SHA-256: 49e77e30b74992af24297b8cb63c5b36f2bad80f9128904281c7ae6c0201092c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the PDF is a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the nature of link farms and the ClamAV detection strongly suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161368b9d09c30---18301603784.pdf In PDF document text
    • https://podimercrm.com/img/files/kitunexidavifisolozuxareg.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/vibolojakutetulolegokuxi.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/17601129493.pdfIn PDF document text
    • http://huemin.com/fckeditor/userfiles/file/68689278275.pdfIn PDF document text
    • http://rlmlaw.com/images/edit_images/file/xuvikufifowuwiju.pdfIn PDF document text
    • https://nadrozmerne-sklo.cz/uploads/56181216860.pdfIn PDF document text
    • https://mgrenginiai.lt/ckfinder/userfiles/files/66061255183.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/jowuwoverimefekudojal.pdfIn PDF document text
    • http://jobcred.com/rk/jobcred/uploads/image/file/legog.pdfIn PDF document text
    • https://ecoledesgourmets.com/userfiles/file/pogoruxovadexav.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/repifudazilorew.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/joxijedodosulidalila.pdfIn PDF document text
    • http://myucpb.net/userfiles/file/70634931.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/89589969627.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/80136314081.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/48503325060.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/pokizuxosidufotasodex.pdfIn PDF document text
    • https://cv-vezouze.fr/media/file/sigedugevedif.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/88341996037.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/wafisasokawukis.pdfIn PDF document text
    • http://computerdoki.hu/user/file/54393579030.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pilive.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=watch+one+summer+night+full+moviePDF 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_off0000f71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71D 17596 bytes
SHA-256: 3f57a74b92273bdab8bcae11d2160ad7ebb9df33e6e0949dbd2646e36f4b51ce
font_01_sfnt_off00012456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12456 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6D 10940 bytes
SHA-256: 2609ec55aca7cdac98f8325b3cf9cb59fb74994030ff996acca2e8c585205f1c