Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d56a034bce51bf…

MALICIOUS

PDF

76.4 KB Created: 2021-03-27 15:23:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 718d2d96a458701a8f56be8819e6c149 SHA-1: ddddea7b4550e6873b42f165d77610251770257d SHA-256: 65d56a034bce51bfda92aa53ba7e111f8b1e6ba6198c376fcf1768241165726d
204 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristics. It contains multiple external links, including 'https://gimoguvi.ru/wix?keyword=black+mart+apk', which likely serve as redirectors to malicious content. The 'ML_NYX_PDF_MALICIOUS' score of 0.999753 and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and linked content suggest an attempt to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gimoguvi.ru/wix?keyword=black+mart+apk PDF link annotation
    • http://denizan.com/instagram_appeal_promotioncel95.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/897227583013bak.pdfIn PDF document text
    • http://pijojavoto.mygamesonline.org/2032942443.pdfIn PDF document text
    • https://boxoxezerutevok.weebly.com/uploads/1/3/4/3/134317212/96c4e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490953/normal_6021a5b82c54a.pdfIn PDF document text
    • http://callup.today/gigawogutuxebejakiburz4lbl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_6043c14f7a338.pdfIn PDF document text
    • https://rulafowobunafo.weebly.com/uploads/1/3/5/3/135391395/2315179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_603cf5a738e0a.pdfIn PDF document text
    • http://maxobujixeweden.sportsontheweb.net/lavipegevuwaziripo.pdfIn PDF document text
    • https://sedidumorasu.weebly.com/uploads/1/3/4/5/134507492/kanadekutuwutavog.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/cobra_19_ultra_3_rangeamqc5.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/62076545310.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/blue_collar_brilliance_summary_and_response.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c49cb0-81ad-4c84-bc79-188240e18afa/coolpix_p510_battery_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/29962851277.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/free_reading_comprehension_worksheets_for_grade_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be29ea95-4ccc-477e-977a-53b1bb18e226/free_plan_drawing_app_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/tapojumewivexigusor.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/32938572236.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_off0000ee6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6F 5012 bytes
SHA-256: 6f169d39f10945c7386a006342f8beb1b6864a60aed73b38c2f7387e4f4d0792
font_01_sfnt_off0000ff69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF69 11320 bytes
SHA-256: 7fece8553d5435256b245a80d79c50259ef28d707369765924094c13bb04e698