Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1924bc7b953fe77…

MALICIOUS

PDF

74.8 KB Created: 2021-03-21 21:23:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a1d59f4181e5a01fdec5c9601854f53c SHA-1: d5b0b157b64ef80412e70cff30f45aef8dfc2863 SHA-256: b1924bc7b953fe778b5f725999bb1c0d17d609db0dabaf26718e619e0fa0f18b
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains, suggesting a link farm designed to direct users to potentially malicious content. The presence of a URL related to downloading 'football manager 2020 apk free download' indicates a lure for software downloads. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the assessment of a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/wix?keyword=football+manager+2020+apk+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487663/normal_5fd27b518409b.pdfIn PDF document text
    • http://lojapunerilifev.22web.org/school_budget_planning_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484156/normal_600c6e001c0be.pdfIn PDF document text
    • http://mibewoz.22web.org/3rd_grade_math_multiplication_and_division_worksheets.pdfIn PDF document text
    • http://debagigitefofo.iblogger.org/baghdad_history.pdfIn PDF document text
    • https://vuginavoji.weebly.com/uploads/1/3/0/7/130775358/402596.pdfIn PDF document text
    • https://vebazefi.weebly.com/uploads/1/3/4/0/134040586/3769409.pdfIn PDF document text
    • https://bewulikafujisew.weebly.com/uploads/1/3/5/3/135326730/kuvivijijitewakedasa.pdfIn PDF document text
    • https://famexowizesiz.weebly.com/uploads/1/3/4/3/134359716/91153.pdfIn PDF document text
    • https://lixazasowab.weebly.com/uploads/1/3/4/5/134588429/7975026.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_21d3b79ef3654affad6aa897e7f00e93.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06bd640-aa47-4d7f-a6a8-30567a82e48e/gebabevubotozizenet.pdfIn PDF document text
    • https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_78124d7eaf994b3ca9937ae206b45686.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09c5721d-ca6c-460d-a908-d5f5de64179c/how_to_get_contour_next_test_strips.pdfIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_56bd8873a3354b6389e6698d1439fba5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/599f2573-2b83-4d63-9bec-2b7c49bed98f/is_it_worth_to_learn_php_in_2020.pdfIn PDF document text
    • https://2dc0326d-ac60-47d8-bf46-f2dc9d334570.filesusr.com/ugd/21b4a7_d3583f0d58624295a3d7a81e3b8e1979.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dddb330-1090-4adc-857b-c7d867559f85/how_to_write_a_descriptive_essay_for_grade_4.pdfIn PDF document text
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_97865c8c039d46a99516197370940afd.pdf?index=trueIn 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_off0000e3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C0 5708 bytes
SHA-256: c20c0f88523c5191391e7cbb75b4c5be45ea502587f2f6c743032a44a503ecc6
font_01_sfnt_off0000f733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF733 11476 bytes
SHA-256: 1061c5d8105a44b95f1304e2618c258ebd39234f168149e40277aadf8b324ac8