Malicious PDF — malware analysis report

Static analysis result for SHA-256 f985e1bf3669adfe…

MALICIOUS

PDF

89.5 KB Created: 2021-07-01 00:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: daba03bfed1f54f59f63374c56124ddb SHA-1: c33b0b768b2055ebafdabda416b714961e1f4dcf SHA-256: f985e1bf3669adfe2496b658fa91942eafc84c5386a357dba9dd0e001b3afdc9
96 Risk Score

Malware Insights

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

This PDF document was flagged by an ML classifier as malicious. It contains a large number of embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to potentially malicious content. The presence of 'utm_term' parameters in some URLs indicates tracking or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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=clash+of+clans+fall+update+2020 PDF link annotation
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/c93dd48170976e4fc14fbbd37c078ff6/livebofideweriwunow.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/35521047426.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16089ef50408cf---53891736648.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/povufot.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2139674046---zibojamenexuzatarov.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d8ba22151a5a047f95db7d61503536d6/fajakojapifa.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc21d2c138---vawasixalipiwowonaxa.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16074477796c33---51971767561.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160842a9945a98---rakejagomuj.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/96702397882.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607665b168c03---93240979050.pdfIn PDF document text
    • https://europartner2.pl/uploads/rozidevuvaxiwador.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/fsg9fbsjhu1qc2t7bkun7ophpe/15362435571.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/d3f6af133749b28eb163613307e8893e/tizavinediwesez.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/70405640141.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/d88cb98d76880494931aa46f517961d7/jasubego.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c0904ba346cfdf97482c324e7a9bae72/41530931022.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d3dca8ec2a0---47614667156.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/8e887ec0c572697c13598a109d9bd0eb/widumibexexululezewopaxi.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/65b71f0168c6a77d376b237bf05411a1/4847675808.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/36g3n10at901tjt23r304r31g6/dotike.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_off0000fab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB1 17292 bytes
SHA-256: 311d4ca1c1dcf3ee11191dc2487a9f74d495f119848595d377d9c045579b57e1
font_01_sfnt_off000127ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE1 10900 bytes
SHA-256: 6e32ec398a593c1b39e9ab327056b6879f127f45ac253e267719d518f9a8de3b

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