Malicious PDF — malware analysis report

Static analysis result for SHA-256 67bb9d986280302d…

MALICIOUS

PDF

78.0 KB Created: 2021-03-31 21:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a690a8e09eeae0a7d884052ac04f7ab7 SHA-1: 5cff56a5e7b453f5807b4f7815a2ff7dfd3ac04b SHA-256: 67bb9d986280302d3ae6a9fcbb36d647cbbfb3aa0f6a29c338301bb4c8717fd4
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, 'https://druttle.ru/wix?keyword=blackmart+apk+app+2019', suggests a phishing or malware distribution lure, likely related to app downloads. While no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of a malicious document designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=blackmart+apk+app+2019
    • https://cdn-cms.f-static.net/uploads/4402940/normal_5fd16e5291642.pdf
    • http://pixelbarista.com/corporate_finance_11th_edition_solutions_manualoijxb.pdf
    • https://gukujevanedin.weebly.com/uploads/1/3/5/3/135344472/dovojorudem.pdf
    • http://mbfsopg.com/vemaxuzepitixaxatepopedm17f4.pdf
    • http://yourbigdick.space/flyff_fast_leveling_guider9uzd.pdf
    • https://marikiwow.weebly.com/uploads/1/3/1/3/131379510/03e8750a4369a.pdf
    • http://walkover.me/zewomowikefuwiwafovafaxm366t.pdf
    • https://static.s123-cdn-static.com/uploads/4403276/normal_5fcda60221418.pdf
    • https://cdn-cms.f-static.net/uploads/4368970/normal_603098cb36c48.pdf
    • https://cdn-cms.f-static.net/uploads/4393485/normal_602d421e7f9e0.pdf
    • https://ranefegol.weebly.com/uploads/1/3/4/4/134498511/9776898.pdf
    • http://micrometer25bill.site/6826059543oc6cp.pdf
    • http://goldotzyv.ru/mechanical_engineering_internships_summer_2021eo60p.pdf
    • http://help-bluebadgecenter.com/microbiology_jobs_salary_in_uaev5hx5.pdf
    • http://bristol-yalta.run/dirt_devil_vacuum_bags_type_u_home_depotqfu70.pdf
    • http://netzamka.ru/document_signing_certificate_templatej8o7f.pdf
    • https://cdn-cms.f-static.net/uploads/4481286/normal_5fe884559293a.pdf
    • http://about-igsupport.com/7970469168838p2d.pdf
    • https://favigogijow.weebly.com/uploads/1/3/4/6/134643924/parim.pdf
    • http://civiliscmq.online/manamejojujopebefinuxiwoj0lglu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/geraromu/friendly_letter_writing_worksheets.pdf
    • https://s3.amazonaws.com/zubuwujoxom/loxedaxer.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f289.bin
a1312ff4af1c68d4dbd7b87e32ede11621af50501ed176a50fc9d0a67c7d9f0f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF289 5496 bytes
font_01_sfnt_off0001052d.bin
a39ea06939c5e83bd070870a8dd77bde00a339647cb1d2dbffeeadfdf88de4de
pdf-font-stream PDF embedded font (sfnt) at offset 0x1052D 11040 bytes