Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4281d8a5ec36a76…

MALICIOUS

PDF

49.2 KB Created: 2020-10-11 16:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c1e2b958c95699056cc15ee613ec5c98 SHA-1: 29c2e35fc85dffc683d0a18a1d40342afba4c7b6 SHA-256: f4281d8a5ec36a76d34c3983389e7d1d51f18ce13abdaccfd5050261907988f5
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://gettraff.ru/pify?keyword=irocker+bluetooth+speaker+xp-1500 In PDF document text
    • https://site-1048481.mozfiles.com/files/1048481/sedojamatopigijer.pdfIn PDF document text
    • https://site-1039711.mozfiles.com/files/1039711/lebaki.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/jubelaxurenir.pdfIn PDF document text
    • https://site-1036910.mozfiles.com/files/1036910/gesopifojedexibuwowiw.pdfIn PDF document text
    • http://files.hughstrawn.net/uploads/1/3/0/8/130874672/732288f.pdfIn PDF document text
    • http://sokeni.precisionfitnessandnutrition.com/uploads/1/3/0/7/130739059/nifurakopuj_nisafujapiv_tejafevezixepa.pdfIn PDF document text
    • http://mivaromu.nathanielwhitmore.com/uploads/1/3/1/1/131163494/benine.pdfIn PDF document text
    • http://files.themonkeysbanana.com/uploads/1/3/1/4/131453267/lofudituwut_lapazebo_wisajatesupo_jowiv.pdfIn PDF document text
    • http://files.myplussizediary.com/uploads/1/3/1/3/131381480/8344243.pdfIn PDF document text
    • http://files.bikerstoreuk.com/uploads/1/3/2/3/132302802/dijigeji-busuwigijami.pdfIn PDF document text
    • http://buwulav.gvth4.com/uploads/1/3/1/6/131607062/ruzunufavulotet-lezowogane-rakuvojax.pdfIn PDF document text
    • http://files.tanyasdanceco.com/uploads/1/3/1/8/131857631/wekat_megezureg_lanokibura_falus.pdfIn PDF document text
    • http://nimolo.barefoottofino.com/uploads/1/3/2/7/132741009/8569925.pdfIn PDF document text
    • http://files.mrshutesclassroom.com/uploads/1/3/1/4/131406234/d1a23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3384/6172/files/malwarebytes_premium_key_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0603/3063/files/truck_bed_water_tank_with_a_63_gallon_capacity.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_off00007d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D02 5580 bytes
SHA-256: 387353648a5e5de43f99254a1d16927f68259fb03b2ebe2629aab66bd3cf96dc
font_01_sfnt_off00009000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9000 11852 bytes
SHA-256: e006bb564b4a4fc3a3e125be8bfd948d2c93ccb377ba539d313bf9c66ddde02d