Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd0cd69344a1cd70…

MALICIOUS

PDF

85.4 KB Created: 2021-07-13 16:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e842648175ab3d8419eb0fb8b81979e5 SHA-1: 37b0f17fbd3b6e270d85a2c95bac7d292f02d674 SHA-256: cd0cd69344a1cd70c9a5a20da58bbe711585fe406494045e42f15034f2c9a4e2
96 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to what appears to be compromised WordPress upload directories. These links are likely intended to serve as a distribution point for further malicious content. The ML classifier strongly indicated maliciousness, supporting the interpretation of this document as a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e82e3238c9---251769106.pdf In PDF document text
    • https://west-holding.com/userfiles/file/suzixevavenanusefuxigoj.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/cb0909f5ef8eda50157273bab233a035/jokowamoz.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/a84b2a8125a82531e1e6b1c6dddb932f/95626079873.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4a83cf623---sujilojevu.pdfIn PDF document text
    • http://artside.org/data/temp/file/51490460484.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/hhs6dlu5dvhnkbecrsgclcorbo/gufewopakelijepiwibadov.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090a20e9b8ec---95111228166.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/23ce296fbd1a95177bdde08da9269cd3/fepodot.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/qttvbed05jb2ruj1m3di3e2o8j/20979275708.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/m7aqgaprtludnntbieaqbktmgp/xowanetitogimimota.pdfIn PDF document text
    • http://naoshima-habitant.com/77551144751.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cb976013902---5988082206.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/48791005893.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/e5f9f999a40ae1a54e26959f7a9bda5d/japadidanezenomuki.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/gn8ipsleqi2qn4fvn67v0vf7do/wavevuwusaniladisa.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160737d828737b---juvoresasuguzasabo.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/91261384373.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c008bc5f13e---30587988023.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f08aac139a---nenuravusinurokuvokiwuxo.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804678632cd---tuvemixamopetewevilureje.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/0f830038de657b623def5d9c44e2790b/misudigusa.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/tojebasimurakum.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/gejudiba.pdfIn PDF document text
    • https://brs.jo/userfiles/files/niwonukafeguwab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=harry+potter+and+the+philosopher%27s+stone+streamingPDF 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_off0000e94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001015e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015E 17508 bytes
SHA-256: a5c4ef2d90d4ffab391f2361cc753344e39589380b2aaa13fae7e9a545e10bb5
font_02_sfnt_off00012ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF5 10976 bytes
SHA-256: fdd9d04e68b0cfd45d893d6422d7c32e986c90a73848b2e08c9ecda223031a89