Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe14623891e80c8…

MALICIOUS

PDF

82.8 KB Created: 2021-03-23 05:17:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c457d167719e7fe7cc7982c950c96934 SHA-1: 6b49eeeea6651cfc4265b0f273c5c157956533f1 SHA-256: cbe14623891e80c81accb4f019e26ee1019acccc607f9739368ea232607b71e6
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains a link farm and an external URI. The embedded URL, https://xezojetit.ru/wix?keyword=jennifer+lopez+achievements, is likely used to redirect users to a malicious site. The presence of PDF-specific heuristics and the ClamAV detection name 'Pdf.Phishing.Trojan' suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://xezojetit.ru/wix?keyword=jennifer+lopez+achievements PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419822/normal_6054c906c3929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_60286c0d53ce6.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/1f6eda84-2560-407e-8a25-6dcdf3efeee7/first_grade_math_curriculum_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/836089f1-bc31-49bf-84a4-acfb156db39d/what_is_research_methods_in_psychology.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/bajrangi_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/fopenupugigenifuw.pdfIn PDF document text
    • https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_08f3a165aa7943778b71b632bad25c3d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sezebepit/advanced_mathematical_methods_for_scientists_and_engineers_solutions_manual.pdfIn PDF document text
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_151f8449c82744229be7736fe408a36f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gudukupir/kegorabevigesoderosewo.pdfIn PDF document text
    • http://revuzinolijafit.epizy.com/the_body_language_of_love_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/cardinals_injury_report_nfl.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/85307466064.pdfIn PDF document text
    • http://nejokamofa.rf.gd/business_law_exam_1.pdfIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_0ac156d630ba4a40be3420de25db32cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/gaxalaribavomezafelimule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/769096e7-ed8d-46f9-b2f0-d6b1e00b4c91/first_alert_explosive_gas_and_carbon_monoxide_alarm_error_message.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/certificate_of_conformity_coc_tanzania.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_off00010490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10490 5352 bytes
SHA-256: 589589f6eec5e25d96dece6f10af4f2d3ea0b4abeef0028a292b4fe4a8def46f
font_01_sfnt_off000116b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B2 11532 bytes
SHA-256: c25f493874aed460a2cabf5fb94180459e469da888260bfb18b07470ae15437d

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