Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0227eaae9abf7ad…

MALICIOUS

PDF

80.5 KB Created: 2021-03-31 23:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: dfea0bd7e9e0ffaa7547d2986eb5196f SHA-1: e239a17d780acb277eadb7035d0576c49bcacd58 SHA-256: b0227eaae9abf7ad85baca672a0933110e48c2fb3cba18bebe4ee5eb02779a33
126 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting services, suggesting a link farm or SEO spam campaign. The primary URL, 'https://soxebez.ru/strik?utm_term=john+deere+lawn+tractor+snow+plow+attachment', is likely intended to redirect users to malicious content or phishing pages. The ML classifier strongly indicates maliciousness, supporting the assessment of a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=john+deere+lawn+tractor+snow+plow+attachment PDF link annotation
    • https://cdn.sqhk.co/konafomaz/iXddjjP/1264231768.pdfIn PDF document text
    • http://xazupadapafow.mypressonline.com/zogetagalafabidez.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/jaLijLT/okay_good_night_in_english.pdfIn PDF document text
    • http://bogplaktnc.fun/dibizogarajuzisafojavora9oovd.pdfIn PDF document text
    • http://visionnew.xyz/11056582275xa4ua.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/kgh8YZd/free_followers_for_twitter_app.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/hh1iagj/battle_buddy_tarkov_android.pdfIn PDF document text
    • http://strahuemsya.info/farming_simulator_2020_apk_download_pch6v7f.pdfIn PDF document text
    • https://cdn.sqhk.co/pukikojat/0r3gg4q/fidif.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/eibDgdl/self_employed_cake_decorator_resume.pdfIn PDF document text
    • http://weareanonymous.org/bluestacks_apk_dosyas_ykleme8jzdc.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/2fjdugc/candomble_religion.pdfIn PDF document text
    • http://presentinsta.online/rumble_build_urft8vd5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_3c2613d53fbd462abe6e5c435509135f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/095e3a74-a250-4655-89fc-390cb9c85ca6/i_am_free_soul_quotes.pdfIn PDF document text
    • http://metiguwuwezaza.atwebpages.com/apache_tomcat_server_administration_guide.pdfIn PDF document text
    • http://lipeporo.onlinewebshop.net/bsc_zoology_question_paper_2020.pdfIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_5142ec318d2b4476bbd1a206527e68ec.pdf?index=trueIn PDF document text
    • http://rosajeku.myartsonline.com/zidetatitiwa.pdfIn PDF document text
    • https://ed7c5604-ec0f-4ae6-9d22-6d534b57d154.filesusr.com/ugd/1d5a3f_1f626ec62de5445e97d0175c2f187b92.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f983d579-e3f5-41fe-904c-4c29ef03b239/lion_face_3d_model_free_download.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDF 5396 bytes
SHA-256: d96083d26903262ee2f0c430585669642cfa09f89f5792e062f7dbe73cdcf576
font_01_sfnt_off00010e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1C 11208 bytes
SHA-256: a743118ce31d428c158fd50250677583a251ab900c2b7bffefdfd948baf622c7

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