Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5e111c9cfe2581…

MALICIOUS

PDF

74.5 KB Created: 2021-03-18 09:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b75c511171906816adf3d21898ed14eb SHA-1: d0693d3b42f4bbad160048c1e937bc8b92419949 SHA-256: ee5e111c9cfe2581ca30831552a952a6fefa163db5cdf323fd1081a389898a7c
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF file exhibits characteristics of a phishing lure, specifically using an "RP generator" theme to entice users. It contains multiple external links, with a primary redirector pointing to 'dugedepap.ru'. The presence of a "Password-protected archive handoff" heuristic suggests the document is designed to trick users into downloading an encrypted file, likely to bypass security scans. The ClamAV detection and ML classifier further confirm its malicious nature, indicating it's a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dugedepap.ru/wix?keyword=rp+generator+no+survey+no+passwords PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487419/normal_600eb0e10157e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421205/normal_5fee9eaf901d7.pdfIn PDF document text
    • https://mizavujubamu.weebly.com/uploads/1/3/0/7/130775062/sunolupotatile-bapukil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478923/normal_5fcbb66ed178e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500429/normal_604173ca9f33e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409243/normal_5ffc357f4c3a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402706/normal_601a4ac354d83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446170/normal_5fd086ec33f3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420597/normal_5fcaaca4a6cbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_604db4e63a42a.pdfIn PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/33bee.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/f9475980-ee8b-46b9-9f79-bc188b145076/panasonic_countertop_microwave_with_inverter_technology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4d60dd0-165a-480b-8bab-835d8bdc21a2/15042333661.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/responsive_email_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c05340-940c-4a63-9fce-35f83c3d9bd7/blood_bowl_2020_rulebook_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/deliverance_james_dickey_themes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd49a7cc-f4c3-4ecf-a4bf-3194433bdded/english_grammar_worksheets_for_class_7.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/imsai_arasan_irudhi_mounam_pulikesi_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/compare_and_contrast_setting_worksheet_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/87116351570.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/diveva.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/zetesukiniligulipekut.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/46551354602.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_off0000e6e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E2 5356 bytes
SHA-256: 59ff5203831b5ba3b214cee83cde0f71c629c44c98e5f2e1e829e24a041b27d5
font_01_sfnt_off0000f94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94D 10428 bytes
SHA-256: c972fcaab832743c8ac2a2364191ab4406c659203a05eea81246f6954b2fc9be