Malicious PDF — malware analysis report

Static analysis result for SHA-256 8caff2334ae1aac9…

MALICIOUS

PDF

85.8 KB Created: 2021-03-29 18:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6ff624686a56aab35f9837f77165ea93 SHA-1: 29c43ca9d5961751607b1b09deb73c96295bd7cb SHA-256: 8caff2334ae1aac9c6fe8f4d206198823345b9f44940370c193807baec6b99ce
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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=chemistry+gas+laws+practice+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384461/normal_5fd658fc21dac.pdfIn PDF document text
    • http://juxoxelobonoje.22web.org/renai_circulation_trombone_sheet_music.pdfIn PDF document text
    • http://wakekuluma.iblogger.org/12023824088.pdfIn PDF document text
    • https://xofuvavafifibib.weebly.com/uploads/1/3/4/3/134386759/87a08d0c8e7.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/YZgdKjb/58708905115.pdfIn PDF document text
    • https://cdn.sqhk.co/xolizoxime/R0OoYys/jepaxexi.pdfIn PDF document text
    • http://vagoneviwesum.66ghz.com/airbrush_pro_full_unlocked_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379374/normal_5ff77602588b9.pdfIn PDF document text
    • http://fuvagezilavez.mygamesonline.org/biosense_webster_product_catalog.pdfIn PDF document text
    • https://cdn.sqhk.co/rapalaxob/dvZjadL/zombie_stickman_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/gjg7fif/minecraft_hide_and_seek_maps_1._14._4.pdfIn PDF document text
    • https://xogowabixebeva.weebly.com/uploads/1/3/4/6/134612916/6537681.pdfIn PDF document text
    • https://cdn.sqhk.co/fitodofafe/4Rhjjex/city_racing_lite_mod_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_600f2467d009b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369512/normal_5ff62b6193f5a.pdfIn PDF document text
    • http://wordsideget.top/murder_mystery_apple_gamekni01.pdfIn PDF document text
    • http://life-news.tech/samsung_galaxy_a10s_specs_and_price_philippines_2020lbycn.pdfIn PDF document text
    • http://trylait.pro/64829196453rdwat.pdfIn PDF document text
    • https://dibusolig.weebly.com/uploads/1/3/4/0/134096246/bugadezexoraru.pdfIn PDF document text
    • https://dodotutole.weebly.com/uploads/1/3/4/7/134764587/8e9b046.pdfIn PDF document text
    • http://wide-mean.top/civ_6_rise_and_fall_england_guideksc0t.pdfIn PDF document text
    • http://instapriz365.online/jozexeruviwexesaseu6tud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pufaperimixalet.epizy.com/nuwasorinojewosimup.pdfIn PDF document text
    • http://visugog.myartsonline.com/aniline_point_experiment.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_off00010e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E01 5508 bytes
SHA-256: 249798dc0fc146165e5ee31e638a279ca3a58f6aab6fc9b308df0867a7c924e7
font_01_sfnt_off000120a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A9 11616 bytes
SHA-256: 708d7bb459398ae608875bac70511940d7dee47d393d4f657c47506954a70761

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