Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b0d5282bfb2b1f…

MALICIOUS

PDF

80.1 KB Created: 2021-05-17 02:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6087f08fbbbebfde4303de881f1ceb51 SHA-1: dd07e65221827e6b6ef59f1d428db5f0a8d2a8ea SHA-256: 67b0d5282bfb2b1fac1afe9d77c02ea2b0c9fe8f24fa741bd934f0a850b22f41
224 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://yafferge.ru/strik?utm_term=a+young+doctor%2527s+notebook+book In PDF document text
    • https://cdn.sqhk.co/manizamo/hdgh68C/79118870673.pdfIn PDF document text
    • https://cdn.sqhk.co/wejewenu/2iegjEa/tezudufevakutub.pdfIn PDF document text
    • https://cdn.sqhk.co/ferobisuw/jJggqgc/99404067499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484624/normal_6042fe2070453.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/dQfichh/prepper_food_list.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/la_valse_d_amelie_piano_sheet_free.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/jLohbIf/futev.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/bJZijfA/83605166776.pdfIn PDF document text
    • https://cdn.sqhk.co/xivomojuf/hcgcriC/mopavev.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/iI0ghhj/logidogajonamide.pdfIn PDF document text
    • http://vitetiw.getenjoyment.net/ielts_academic_practice_tests_2020.pdfIn PDF document text
    • http://pezuxedazof.iblogger.org/xorilixug.pdfIn PDF document text
    • https://cdn.sqhk.co/sokaxopoje/1gexhji/bipikoduvowezobomivule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427498/normal_600a15d7d769e.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/65f30012-7e31-46cf-a075-e51e59606410/xalebuxusanazi.pdfIn PDF document text
    • http://fopopas.epizy.com/tegewopazofatasidesudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47f61d62-72ec-4477-9fa6-4a96172ee9ec/what_do_the_symbols_on_my_danby_dehumidifier_mean.pdfIn PDF document text
    • http://xenezipulugiji.atwebpages.com/25394385871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b3fa08-c258-42be-9e7b-8434419e4de6/subway_chicken_breast_flatbread_nutrition_facts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d65ed95-dae4-4d8b-bc9b-b984605eccb0/gegukoverapapili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96a7348d-1e86-4246-848b-a1ff8334a471/xapanip.pdfIn PDF document text
    • http://pazipinabobon.epizy.com/html5_announcement_template.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_off0000f520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF520 5192 bytes
SHA-256: 7bedcf5ae043d969887c2761370c7b4f6da1a4287741061aa75c4544f72eaab4
font_01_sfnt_off000106f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F4 13600 bytes
SHA-256: c4cd9e61ad6234076abf91525387be9bfd8f1809fea369a86767c2bcf15bae04

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