Malicious PDF — malware analysis report

Static analysis result for SHA-256 586b7580163f5143…

MALICIOUS

PDF

78.4 KB Created: 2021-04-18 01:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5f4d3656bb7b971db76a78f0199ba59a SHA-1: eced77eab32a30b0a87261ccaf10525df29ab0a9 SHA-256: 586b7580163f514353cf6294b52aec99bdf0bee4bafad616093ee5873f507649
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://jottigo.ru/strik?utm_term=what+great+teachers+do+differently+pdf+download PDF link annotation
    • http://zemegazi.22web.org/what_is_the_best_shaving_cream_to_use_with_a_safety_razor.pdfIn PDF document text
    • http://limecash.xyz/kenmore_elite_dehumidifier_recallkp397.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/gcBghSk/fox_sports_mexico_en_vivo_online_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/sexasegavon/ihs9BBS/kodie_shane_ft_lil_yachty.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwibagula/hfgdbPW/anemia_falciforme_causas_geneticas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445531/normal_5ffc12a5c74b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471719/normal_6029f08625939.pdfIn PDF document text
    • https://cdn.sqhk.co/jatobeguji/hbjfzId/gilurokatobizojini.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/khzjac2/77627054689.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/39hfCVk/final_fantasy_xiv_a_realm_reborn_review.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/3jhQUie/drill_evolution_mod_apk_unlimited_money_and_gems.pdfIn PDF document text
    • http://zathkatow.xyz/455070958969q22d.pdfIn PDF document text
    • http://winoraama.fun/a_christmas_memory_truman_capote_themegyel0.pdfIn PDF document text
    • https://cdn.sqhk.co/gizetinediz/I5ggbge/java_jre_1._7_0_64_bit.pdfIn PDF document text
    • https://cdn.sqhk.co/badisasi/rijjjia/48908755672.pdfIn PDF document text
    • http://uber-global.com/bajivuxaforozajodudikuy8ge8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zerozuru.epizy.com/43283963893.pdfIn PDF document text
    • http://vezapuro.rf.gd/acuerdo_de_paris_cambio_climatico_2017.pdfIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_40a4a6357d404b6dbbc6732175bbcecd.pdf?index=trueIn PDF document text
    • http://bekogizob.epizy.com/nagisu.pdfIn PDF document text
    • http://punaxixodakuguk.epizy.com/height_weight_bmi_chart.pdfIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_d87221bd27cb47098b1506b3c465dddc.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_off0000f334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF334 5624 bytes
SHA-256: aaf04c8861a656ddc003ea06d282dddb2410fe56abffe3e3897d035e984b3cfd
font_01_sfnt_off00010673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10673 10936 bytes
SHA-256: 832649f7f407153fb2041a513280449fb9b33a25a770a0ca6e7bf6997bbd9eaf

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