Malicious PDF — malware analysis report

Static analysis result for SHA-256 82cd9d675d6b6497…

MALICIOUS

PDF

56.0 KB Created: 2020-10-06 11:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f54ea426a6b9eff43539e40c07a15b50 SHA-1: b7ce17d20d64c41fea24ba245b3128fdf28b3470 SHA-256: 82cd9d675d6b649787ad04b13499e02d2b91d11ff97548aa91e1ab4523d47ba1
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://cctraff.ru/strik?keyword=ayyappan+remix+songs++masstamilan In PDF document text
    • https://site-1042101.mozfiles.com/files/1042101/guporapafewejaxa.pdfIn PDF document text
    • https://site-1036661.mozfiles.com/files/1036661/64567476891.pdfIn PDF document text
    • https://site-1038898.mozfiles.com/files/1038898/74688066329.pdfIn PDF document text
    • https://site-1040008.mozfiles.com/files/1040008/4340548479.pdfIn PDF document text
    • http://files.jfsylla.com/uploads/1/3/1/3/131379117/toxegipevelodo-juwowiso-jomaj-xixob.pdfIn PDF document text
    • http://files.salsberyonlinegarden.com/uploads/1/3/1/8/131871642/kibewipelifilez_zavupurub.pdfIn PDF document text
    • http://zuwov.gunmanualsonline.com/uploads/1/3/1/1/131163962/nekibusifijag.pdfIn PDF document text
    • http://tijupime.limunconference.com/uploads/1/3/2/7/132740449/fotul.pdfIn PDF document text
    • http://files.fingerlakesathletics.com/uploads/1/3/1/4/131406063/morawuwikajuxu-tojodisopalut.pdfIn PDF document text
    • http://files.christinefoghmusic.com/uploads/1/3/1/4/131409909/tewazimegogoputedafe.pdfIn PDF document text
    • http://files.wildedgeinc.com/uploads/1/3/1/3/131380591/fc59ef83b05ad.pdfIn PDF document text
    • http://bobuxog.dkluxehair.com/uploads/1/3/2/8/132814930/d3bca.pdfIn PDF document text
    • https://site-1038861.mozfiles.com/files/1038861/rowajowawugokogajoroliza.pdfIn PDF document text
    • https://site-1040617.mozfiles.com/files/1040617/fibiviri.pdfIn PDF document text
    • https://site-1040795.mozfiles.com/files/1040795/28396804933.pdfIn PDF document text
    • https://site-1038375.mozfiles.com/files/1038375/lugixofa.pdfIn PDF document text
    • https://site-1041679.mozfiles.com/files/1041679/84033925804.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000093be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93BE 5296 bytes
SHA-256: ca401ce420dc07dc4167091828bc8f6fdb7852a6841a9eda16c497b44b722483
font_01_sfnt_off0000a5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5BF 13900 bytes
SHA-256: 5866bc12122f16250c787ee36ddc831ea66cad1945f212c07b7dd0cc25bdbf0c

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