Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3cc8ce7548eef32…

MALICIOUS

PDF

43.4 KB Created: 2020-10-03 06:52:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dc44e5af388ba0d58c13e61b9d8839cf SHA-1: f42debebb1883d69b006e701cd5d38050c27117d SHA-256: c3cc8ce7548eef32ba7e3cc3e8c2bf07f5a5cb25a8386948a0d7ce4af368b95c
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector. This suggests a phishing attempt to trick users into visiting a malicious site, likely to download further malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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 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/strik?keyword=overture+to+candide+grundman+score+pdf In PDF document text
    • https://site-1036655.mozfiles.com/files/1036655/nekefekir.pdfIn PDF document text
    • https://site-1036861.mozfiles.com/files/1036861/8662442053.pdfIn PDF document text
    • https://site-1039633.mozfiles.com/files/1039633/buvenixev.pdfIn PDF document text
    • https://site-1036661.mozfiles.com/files/1036661/rorilo.pdfIn PDF document text
    • http://files.lightningprotectionlec.greatwebsitebuilder.com/uploads/1/3/2/3/132303151/nazujamijipomixug.pdfIn PDF document text
    • http://files.marshallbob.com/uploads/1/3/2/7/132741352/143339.pdfIn PDF document text
    • http://gezode.lifewellnessnutrtion.com/uploads/1/3/2/6/132695671/bbab44.pdfIn PDF document text
    • http://kikof.behindyourdestination.com/uploads/1/3/1/6/131607131/294006a4.pdfIn PDF document text
    • http://mijikiwap.dashkaroth.com/uploads/1/3/0/7/130776499/4473823.pdfIn PDF document text
    • https://site-1039505.mozfiles.com/files/1039505/zewifivo.pdfIn PDF document text
    • https://site-1036750.mozfiles.com/files/1036750/pekapodizig.pdfIn PDF document text
    • https://site-1038974.mozfiles.com/files/1038974/3793633742.pdfIn PDF document text
    • https://site-1037214.mozfiles.com/files/1037214/dumenikuzadiwevuvorese.pdfIn PDF document text
    • https://site-1037079.mozfiles.com/files/1037079/58791068672.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccfad182-2fff-4219-9e82-89f2c31b43ce/83992069442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b094834-80dd-4eab-b8fa-13e20d500fd8/61176312845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c271c2-5478-4488-ad0e-75b26b9e5bc8/laludelatijovijiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638fde20-7e9e-4aee-9e51-184c67fa7576/tupudukinutaluxebelixedax.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE1 5532 bytes
SHA-256: bcf16a42d24ea7010b62dccf7f96f0d2d0bf10aaaf24e6b31c0e0da7e7ffa7a4
font_01_sfnt_off00007ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA7 10628 bytes
SHA-256: 9c3b464a105089dc35b51240be8b877bb802dc92e503f7091425b6b3d15f31e6

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