Malicious PDF — malware analysis report

Static analysis result for SHA-256 a83f6fb6cdb071f3…

MALICIOUS

PDF

63.1 KB Created: 2020-10-28 07:05:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: d21c08d3730e10c70a84013744268892 SHA-1: b220628dc246ec6d82bbd55ea590f3cf6da83467 SHA-256: a83f6fb6cdb071f3e89dffddae48f144c25ad66f0f708ff6370e11971197dba1
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ttraff.link/pify?keyword=eastwood+rust+converter+canada In PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/6585118.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/32de67401d0371f.pdfIn PDF document text
    • https://datirelegewewat.weebly.com/uploads/1/3/4/3/134329883/xozodadodimez-wujusuduroz.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bekalan.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/1828606.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/mewiwana_mugepako_lupotezedapa_kedugegasijes.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00008fac.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00008fac.bin)
    • http://www.daltonmaag.com/In extracted file (font_03_sfnt_off0000dfcc.bin)
    • https://uploads.strikinglycdn.com/files/2b676f7d-5853-4ff1-b77c-f9c4059fc209/fetodekopexofepugebeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1be261c6-3ec7-4743-88d6-baf4c1ccf114/probabilit_terminale_bac_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03866354-dc77-4509-92b4-299413f822fc/lomiduwekigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/042d8705-187f-46b0-bbb6-ca3ef9e54253/zimafiruzopow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84cfcc92-abd1-41b8-9e00-3554cc1991fc/newirof.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/67542509659.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/14592851364.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/lightroom_classic_cc_tutorials_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/software_architecture_patterns_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453b38d4-aef1-4570-b264-f3c373036f8f/nivabijovakad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c18ecb6-03d9-4a38-9ca0-d6710d477a21/are_gmail_email_accounts_case_sensitive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29a8d6b7-f67f-45d4-9270-e43ff725c952/33416051102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c07eb22-0bed-4800-b0b5-7f6a51969efb/.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/84412978246.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/gabion_wall_design_example.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/89225028871.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/21155673847.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/river_map_of_india_outline.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 extracted file (font_00_sfnt_off00008fac.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off0000c328.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off0000c328.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAC 4844 bytes
SHA-256: 4013450875602b328f806b7e47f4534a21c5b6e75876b94407b5066a12d14d98
font_01_sfnt_off0000a03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA03A 10200 bytes
SHA-256: 0d16be3d28fc9461e382ea2fb4f1b8366ac746262c7d6af50d8f4539a3be00cf
font_02_sfnt_off0000c328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC328 18496 bytes
SHA-256: 4d99ddfa88c1dd7addc2c59754ef33fea246213c5313528a213d38e529fef89f
font_03_sfnt_off0000dfcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333