Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd661182f7f4ab97…

MALICIOUS

PDF

72.9 KB Created: 2021-03-01 13:29:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 41133ee34e36babeb9f7a141426eb668 SHA-1: b2cad4ccbbeee51c1cb6102c78794795d9c1e348 SHA-256: dd661182f7f4ab97c7f968dc084dc1f41f028c0db44942f178f0ee010a8f72bd
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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://dafemum.ru/award?keyword=kozier+and+erb%2527s+fundamentals+of+nursing+chapter+outlines In PDF document text
    • https://fepepifufom.weebly.com/uploads/1/3/1/8/131872298/8faea29b70.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/yij2ihp/68806954658.pdfIn PDF document text
    • https://bogekivusuwi.weebly.com/uploads/1/3/4/6/134604255/3909409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496826/normal_5febedf877071.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378152/normal_5fc8556579bf9.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/99gf8je/regal_cinemas_movies_showing.pdfIn PDF document text
    • https://cdn.sqhk.co/mejabutumu/gfjdeif/jomogajesororiwa.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/deexsuY/zombie_ultimate_fighting_champions_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/0gdOhgB/6812530576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412570/normal_5fe1c373b8be1.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/how_to_use_pt_multimeter.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/tzhaGJt/nemutotumusi.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/kQa1Dhe/best_shooting_badges_for_playmaking_slasher_2k20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449627/normal_5fec054e1cc17.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/chemistry_data_booklet_a_level_edexcel.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/vexufu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tipajodofo.epizy.com/60604841086.pdfIn PDF document text
    • http://gekaxerawuzizuj.epizy.com/56441641005.pdfIn PDF document text
    • http://zevizajezu.epizy.com/65769330171.pdfIn PDF document text
    • http://dikedelunok.rf.gd/beer_nutritional_information_nz.pdfIn PDF document text
    • http://zuxifeka.epizy.com/viwavulisu.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_off0000deb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB5 5764 bytes
SHA-256: e1630c5a40f4ea0e1a666d971186efbf38982e3359111611dbd19d9f3cadfb7f
font_01_sfnt_off0000f23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23C 10352 bytes
SHA-256: 3e4f2a0edb51d4368575d1798e06e27ce4d566a5007a81beade8c988292da463

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