Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e4aa61eacddc94a…

MALICIOUS

PDF

73.2 KB Created: 2021-03-06 04:02:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a13f9fb45fcf966da74596d294a81047 SHA-1: bc24cc0f0b1e056e3fea3cd282e8516a866a18b9 SHA-256: 5e4aa61eacddc94a6f82e45d9dcf6c5760bea54abda408fea67b843b897a5395
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an SEO redirector to lead users to a malicious URL. The ML classifier and ClamAV detection strongly support this assessment. The embedded URL `https://dugedepap.ru/123?utm_term=thank+you+mr.+falker` is the primary indicator of compromise, likely leading to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/123?utm_term=thank+you+mr.+falker PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385413/normal_6034f093925d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479224/normal_6018ec062ab21.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/Sgicajg/tiny_shop_idle_fantasy_shop_simulator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460449/normal_5fe6b7c4efb77.pdfIn PDF document text
    • https://cdn.sqhk.co/rotonoba/1hha3Qy/gimedopemofiwuv.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/hiYjbZ5/linkedin_application_settings.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391047/normal_5fd63c06cfe53.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvexudid/LhfhFjf/6111347961.pdfIn PDF document text
    • https://cdn.sqhk.co/bimolixumotu/bggjhha/teachers_salary_in_pa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387814/normal_6005255b8dc5e.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/yhnia8h/89167674914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496005/normal_603d715e1e177.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/0ifhejj/63516717621.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/8BNDhif/32233728707.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459483/normal_5fc5a310cd272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387826/normal_6013645707168.pdfIn PDF document text
    • https://cdn.sqhk.co/wemegofuk/gfNibwV/gatej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414864/normal_5fd1aecd4b34b.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/d6846305-2873-4f6e-94b3-70b77e17d81e/sokajip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8550e0cf-9244-4252-b0d9-45d18d271160/acer_aspire_1_zg5_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3fddfa8-2928-412c-9def-9a4532eba58f/how_to_assemble_ashford_traditional_spinning_wheel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97753a1-2e9b-4e27-8520-1f1539b9ecf1/how_to_fix_ignition_lockout_on_boiler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f987b3f-fa46-45e7-b919-e2e9ed83e574/52698157176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d67a3c-035c-4e9e-9f4f-0f35797d72ca/grade_4_grammar_lesson_9.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_off0000e2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B5 4976 bytes
SHA-256: 27cd64c75bc513fea4a8c5ea2628551f2f402695999549c5b6210ead4553ba39
font_01_sfnt_off0000f387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF387 10624 bytes
SHA-256: db6ade7d7eac848c0bfc2766de1916bf334c4cf0eeeb50f6730699b17567e68b