Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb073409d214994e…

MALICIOUS

PDF

82.1 KB Created: 2021-05-14 03:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c0053c958a835239f3dc19223d76cb43 SHA-1: 7d904d3ac0979ccb761043d2722d468fa0b12732 SHA-256: bb073409d214994e05b903e8ec77a95624267b33bf48d338b696e5552ba6aaf2
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely intended to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://maypoin.ru/strik?utm_term=how+many+calories+in+panda+express+chow+mein PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417313/normal_5fd3a28d4d60c.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/VuS3gek/ssundee_snitch_hide_and_seek_prop_hunt.pdfIn PDF document text
    • http://zanartcc.net/god_of_carnage_broadway_reviewbr2dz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_6023f6f2b421e.pdfIn PDF document text
    • http://itactical.xyz/9138502521714e20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376874/normal_5fe0ac4a089b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469834/normal_601f2bea36907.pdfIn PDF document text
    • http://cashbackk.site/5455953328ei9zb.pdfIn PDF document text
    • http://hdsamara.ru/saxajivepopeweji4ysk9.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/jjgjeFL/29530865273.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/jZay4tS/bombshell_trailer_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384296/normal_602725ded8300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444636/normal_606d34a7a8e27.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370074/normal_5ff7bb255b654.pdfIn PDF document text
    • http://lumacy.site/legacy_of_the_drow_epubx2t8g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a5a3fad-9f10-4a62-9dd7-fe7935816c1a/23065162174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8680ba-6e5a-4f88-81cb-5957dedcc459/wexetedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c60c49-6cfb-44ab-a29c-04c43e4de2ea/pukikejozaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c58c2d49-cc27-4c4d-8b8d-c3a98543fb3c/27235359360.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://scripts.sil.org/OFLIn 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_off0000eaa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA5 5536 bytes
SHA-256: 6e19ab03fa912723c8542ce763eb6831d07eab80ccec7cec23cdcd4b626b5b1a
font_01_sfnt_off0000fd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5D 11532 bytes
SHA-256: 612ad68b01e17866ec5c2c66affa294192ee0f41ca398937e01f78a103eb28be
font_02_sfnt_off000124c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C4 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939

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