Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fc8ba431c7feb1…

MALICIOUS

PDF

78.4 KB Created: 2021-03-21 01:02:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9ddb092703361b250245842403fb9695 SHA-1: e93a88fbbcfe8848f286ef24d14d37709199ed2a SHA-256: 67fc8ba431c7feb132b245f6379510e09d9c7ae044737ba1bb595366c6ba96eb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://seumenha.ru/wix?keyword=human+population+worksheet+answer+key PDF link annotation
    • http://securespot.ru/8688091327834wbm.pdfIn PDF document text
    • http://magazinrf.xyz/doubles_sheet_year_16z8o7.pdfIn PDF document text
    • http://retamos.mygamesonline.org/36580689098.pdfIn PDF document text
    • http://everydayy.fun/25219179063ipdmf.pdfIn PDF document text
    • http://urott-hu.com/is_aeronautical_engineering_in_demand_in_india94dvo.pdfIn PDF document text
    • http://pogekoxuw.mygamesonline.org/segisonako.pdfIn PDF document text
    • http://magicwoolshop.com/956919120493553k.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/percy_jackson_auditions_2021_disney_plus.pdfIn PDF document text
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/mezifovawumovujo.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/cellular_adaptation_injury_and_death_quiz.pdfIn PDF document text
    • http://wtia.space/favakiwagekuvojelazupulerlh1k.pdfIn PDF document text
    • https://zemizipip.weebly.com/uploads/1/3/4/0/134098502/8920520.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/eed9883e-5a0f-4a22-b8b4-ced019dbd7b8/maytag_gemini_double_oven_gas_range_broiler_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d5cd42c-92b3-4b5f-ab4e-1ccf86dc2210/62997271687.pdfIn PDF document text
    • http://rovizomaguwex.atwebpages.com/birth_control_pill_brands_comparison_chart.pdfIn PDF document text
    • http://zajupulavofawi.myartsonline.com/biochemistry_seminar_topics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c69ab4a8-e8d1-48a8-92c6-f3b009450837/how_to_write_dual_dialogue_in_final_draft.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/42151436593.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_off0000f3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C6 5280 bytes
SHA-256: c47be82ebb3c75b3693eddd14eb9e691056141f2e8912e07decf6ea167e7915c
font_01_sfnt_off00010599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10599 11612 bytes
SHA-256: cf92c2953b0e15ebc870dffedef765af4061f6954fdac34f1f5423c772839cd1

Open this report in the interactive analyzer, or submit your own file for analysis.