Malicious PDF — malware analysis report

Static analysis result for SHA-256 72086ec11ced2f29…

MALICIOUS

PDF

69.7 KB Created: 2021-09-18 07:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a11566e377bd252f9d2e8f74da939ff8 SHA-1: 624874e4b26a9f22f07acd130ddc478e7a95d627 SHA-256: 72086ec11ced2f292bbeeba7a082413564e61b88e120aec3e144b238ad49cd4a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious by an ML classifier and contains numerous external URLs, many of which are hosted on compromised websites or disposable domains. The presence of a link farm suggests an attempt to manipulate search engine results or redirect users to malicious content, potentially for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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://garglob.ru/uplcv?utm_term=pokemon+omega+ruby+rom+download PDF link annotation
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/diwasixuzif.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/62723203942.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/48400507172.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/55958592266.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/45a1eb7f606d6e255c167819ffde6d68/zesuxizaga.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/161388b92aab32---45527134168.pdfIn PDF document text
    • http://contextuae.com/resimler/files/75568798546.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/44594602625.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/8a464bfe783d2622352ea8af3a4b9f9b/34065469779.pdfIn PDF document text
    • https://isitekmuhendislik.com/userfiles/file/15834309264.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109101426053972.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/jojodilinoteluzopamazene.pdfIn PDF document text
    • http://penzionriverside.cz/files/file/tifal.pdfIn PDF document text
    • https://phukienbep.net/media/files/97183962186.pdfIn PDF document text
    • http://actinq.nl/upload/file/jonarowaxelobabukowavozor.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a49debb32---xejivozideratuza.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/47925608781.pdfIn PDF document text
    • https://strongpointmarketing.net/userfiles/file/diguvixajuxeran.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/31459496758.pdfIn PDF document text
    • http://imobiliariaimperio.com/files/files/51712108918.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/10909771971.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/64470454840.pdfIn PDF document text
    • https://www.utn.ac.cr/sites/default/files/files/jaxare.pdfIn PDF document text
    • https://sanruouvang.net/images/uploaded/file/35505950556.pdfIn PDF document text
    • http://dj-maily.com/uploads/pages/files/zetekederi.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_off0000b426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB426 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC38 14380 bytes
SHA-256: f11a3070a8c7472d0e93cbed46f9fd234dccc157f6a1b527c2e33f63032b3c05
font_02_sfnt_off0000f035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF035 10764 bytes
SHA-256: 61933b6d1297be4ec39c74570e9d150b75aa8610a2542176406983b6de5828ab