Malicious PDF — malware analysis report

Static analysis result for SHA-256 385815ec7f9caa0d…

MALICIOUS

PDF

89.6 KB Created: 2021-07-05 21:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9f669be0d9e18bcff94ae5aee74f63d6 SHA-1: dc038c554bda1b77de254f2ac870dc3f1cb1296a SHA-256: 385815ec7f9caa0d69c1e7acd587d4102ec636b48289e8d86440c00ce6fccb9e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous compromised websites, many of which are hosted on disposable domains. The ML classifier strongly indicated maliciousness, and heuristics identified it as a link farm on compromised CMS uploads. This suggests the document is designed to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://maslag.eu/userfiles/file/84483412360.pdf In PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/492373d77f7b1a8175daa4a26d6441a9/61428621144.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/40515525824.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2847272ee8---ginojekonixubulute.pdfIn PDF document text
    • https://exporoaster.com/app/webroot/files/images/pages/files/59875614323.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608983179b3aa---13604957049.pdfIn PDF document text
    • http://camptagola.com/clients/66689/File/45661744530.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/8478619198.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160af7f0248a47---vufepemuxogotufetika.pdfIn PDF document text
    • http://thechoose.it/file/18050740875.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b58700c9c8f---puvezakigi.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/s37dhvd91ar3i583glj2hb74fq/84862423744.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c388678e375---tokexomenugin.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/906fda45ed4aca649d1099da18413f1d/mezutididaxufo.pdfIn PDF document text
    • http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/lesevovel.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e3920a780---19944949614.pdfIn PDF document text
    • https://landi-bg.com/images/file/fibizukufakivizafo.pdfIn PDF document text
    • http://abnicum.com/files/file/pitozuvajapigodurejan.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d36013dcc2---63806114597.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/kejomalexodamore.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/53893303424.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/7622f3cc847a796dff2cff883859dcf3/mobemabodupigonixob.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/40373136579.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/e23de8996cb95b8e5887dcbdd7eef844/13725853203.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=simplicity+is+the+ultimate+sophistication+meaningPDF 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_off0000f7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C8 18440 bytes
SHA-256: 28a3a083ad2cbb10bd1acdfe369d1dbd789439224cb9abef0f1cb3321277d9a2
font_01_sfnt_off0001277f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F96 11012 bytes
SHA-256: 133e7adc0a17d11b00cad5da8bad8106c723f9ab2e46ddebffd76061959a7b0e

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