Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db714c930a9a276…

MALICIOUS

PDF

82.6 KB Created: 2020-12-31 06:23:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f9219fe5c13a6b5113c8f240f7809c94 SHA-1: 7f88ee38751be3e3097329189c31e3a1dde6d681 SHA-256: 7db714c930a9a2768cacdec7149f55240431cb403534b10b24d3b4e2a8dd755a
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to redirector infrastructure designed to lead users to malicious sites. The primary malicious URL identified is traffmen.ru, which is associated with phishing and malware distribution. The presence of a ClamAV detection for Pdf.Phishing.Trojan and ML classification further supports its malicious nature.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=download+dead+space+apk+1.1.38+android+games+free In PDF document text
    • https://cdn.sqhk.co/muresogus/X5TcTtM/fosijozilitizarupanulip.pdfIn PDF document text
    • https://vomagorawu.weebly.com/uploads/1/3/4/7/134720662/movojubelo.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/TPEC6Pa/sim_free_mobile_phones_amazon.pdfIn PDF document text
    • https://nutifikidejuz.weebly.com/uploads/1/3/4/3/134347692/fulumilevepefibawid.pdfIn PDF document text
    • https://varavedonenen.weebly.com/uploads/1/3/4/3/134316352/dubifalavarenexomuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379038/normal_5f94525839f64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495841/normal_5fb78a7e3d17c.pdfIn PDF document text
    • https://rawunixu.weebly.com/uploads/1/3/4/5/134527334/4e34c1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/broadsheet_brisbane_lunch.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/gigabyte_aorus_pro_wifi_z390_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/80943289165.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/cloze_activity_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/structured_system_analysis_and_design_methodology.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/creepshow_2019_parents_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACD 6072 bytes
SHA-256: 3922c5339712de7d49e2e40b859447ddf10fcbf9d93823da0fcbea44b8fc0f35
font_01_sfnt_off0000ff8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8A 11884 bytes
SHA-256: 82b335a3fd6c4bdef48ee1428b4125c24b9ea978137f8da5147f33fd3f257832
font_02_sfnt_off00012615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12615 16060 bytes
SHA-256: df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210

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