Malicious PDF — malware analysis report

Static analysis result for SHA-256 980c6740c5269f26…

MALICIOUS

PDF

76.9 KB Created: 2021-03-18 19:07:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ab0d85b7ac979fcb5f5efece9c207bcf SHA-1: 8aa64813e3af0c083d12917b37ba97da7fc81c90 SHA-256: 980c6740c5269f26341f95afeee30385a84e229d109e272ba2812569be96105d
126 Risk Score

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 0.9996

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://resalured.ru/wix?keyword=days+of+our+lives+writers+email PDF link annotation
    • https://vasirorikipik.weebly.com/uploads/1/3/0/7/130776585/lukan.pdfIn PDF document text
    • http://rimka.xyz/what_is_a_giant_star_astronomyctjdo.pdfIn PDF document text
    • http://vbruti.site/fast_and_furious_turbo_charged_watch_online0pu6b.pdfIn PDF document text
    • http://republvinb.fun/aksara_sunda_lengkapqleyl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421983/normal_5fd3b9c851f44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387925/normal_60315b190b5e2.pdfIn PDF document text
    • https://mozalotajevel.weebly.com/uploads/1/3/2/6/132682758/dokirezulud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386842/normal_601ef3f0111c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482872/normal_5fcc82f429700.pdfIn PDF document text
    • http://lifeit.pro/drt_be_yaynlar_ygs_matematikwj4if.pdfIn PDF document text
    • http://jujusakukexajo.22web.org/37302358145.pdfIn PDF document text
    • https://puxipevabama.weebly.com/uploads/1/3/4/3/134308905/ponijozavolawine.pdfIn PDF document text
    • http://tuworiki.22web.org/tolerante_si_abateri_de_forma.pdfIn PDF document text
    • http://www19216801.site/girl_from_ipanema_partition_guitaremwc0h.pdfIn PDF document text
    • http://populiro.iblogger.org/24438344242.pdfIn PDF document text
    • https://zikegebuner.weebly.com/uploads/1/3/4/8/134856814/3ea819062d876.pdfIn PDF document text
    • http://duboxol.iblogger.org/high_school_report_comments_examples.pdfIn PDF document text
    • http://zizaburixakog.iblogger.org/critical_theory_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xigufogadenake.epizy.com/second_conditionals_exercises_with_answers.pdfIn PDF document text
    • http://nezenomawaza.epizy.com/rojekudolutibofevutaner.pdfIn PDF document text
    • http://mofagadelebedos.rf.gd/3d_car_racing_game_apk_free.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_off0000e958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE958 5164 bytes
SHA-256: 75cddd2f094c9e668350a8817e47db7c1ef58ee5997a2af2d831e08903de75f6
font_01_sfnt_off0000faf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF7 12644 bytes
SHA-256: 1ca2a2338958a7fc092ed0a9434762483ba9d51175d9aaf9d297e3aa1cac283d