Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1b778427d512123…

MALICIOUS

PDF

67.9 KB Created: 2021-02-26 19:11:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 858d928f33ed32fd5d27dd7b3e7a551f SHA-1: cc4eca40c2f855d54d8fdd2dd310e13a8b7703ea SHA-256: f1b778427d5121231d42a4914f8da30dcdb168262f1b212310d60df8a42b8011
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://bologen.ru/award?keyword=perrine%2527s+literature+structure+sound+and+sense+ebook PDF link annotation
    • https://bofopigefofimun.weebly.com/uploads/1/3/4/0/134016695/nozoviz.pdfIn PDF document text
    • http://itrom.fun/pewazivegewutirikudifec9y34.pdfIn PDF document text
    • http://naturagrush.space/zeziwedodetr7jl.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/a497a48ad.pdfIn PDF document text
    • http://securityverifiedservices.com/android-_tools-_adb_ubuntu_15._041cxy3.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/foturikogukexomeji.pdfIn PDF document text
    • http://ufenmac.com/social_skills_for_following_directions58azz.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/ergeyha/vikings_warship_gaming_chair_specs.pdfIn PDF document text
    • http://axecheat5.xyz/nikon_d5200_with_70-300mm_lens_price2lhsi.pdfIn PDF document text
    • https://sukutunog.weebly.com/uploads/1/3/5/3/135304197/gureriwopevolu.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/Lhdjdjb/swipe_brick_breaker_cheat_code.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/g6zjgia/zijurunegepivedifelepil.pdfIn PDF document text
    • https://cdn.sqhk.co/simikimira/igjfjg8/ielts_vocabulary_words_list.pdfIn PDF document text
    • https://niromegezos.weebly.com/uploads/1/3/2/6/132681660/givutapaza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jisijuvod.myartsonline.com/solar_energy_questions_to_ask.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_off0000ce11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE11 5172 bytes
SHA-256: cfaab796dc780cbf41ecc4757b54c2282083ecae80a439b3fde1fe34bec93a75
font_01_sfnt_off0000dfb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB8 10076 bytes
SHA-256: 15e4576d19c02d41f4418f7216465082126a8f295568a8bdeb992f2dce11bf6b