Malicious PDF — malware analysis report

Static analysis result for SHA-256 61986039110c7440…

MALICIOUS

PDF

70.4 KB Created: 2020-10-07 10:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2c169f75ac1ca684523cd0e7f1922e66 SHA-1: 9291ca3b5407cb374bafbe96ecdfa36e5fc1860c SHA-256: 61986039110c74404d4d18a9519b3056b76765df2ae984664b48fc7e73dd0ceb
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, including one pointing to a known malicious redirector and others forming a link farm. The presence of a 'password-protected archive' lure heuristic suggests an attempt to conceal a malicious payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ong+bak+3+full+movie+in+hindi+filmywap In PDF document text
    • https://site-1038650.mozfiles.com/files/1038650/sefugurim.pdfIn PDF document text
    • https://site-1036678.mozfiles.com/files/1036678/38772206064.pdfIn PDF document text
    • https://site-1042452.mozfiles.com/files/1042452/86765352452.pdfIn PDF document text
    • https://site-1037142.mozfiles.com/files/1037142/gedevopuji.pdfIn PDF document text
    • https://site-1039911.mozfiles.com/files/1039911/toxizuvaduwekogijatip.pdfIn PDF document text
    • http://files.bieberherefords.com/uploads/1/3/0/7/130775029/luwasasan-gotuvima-xusesapesa.pdfIn PDF document text
    • http://files.lacombenajac.com/uploads/1/3/1/8/131856277/bc272.pdfIn PDF document text
    • http://samilu.belezasidinginc.com/uploads/1/3/0/8/130874493/nigowefivaf.pdfIn PDF document text
    • http://pomava.bodyessencellc.com/uploads/1/3/1/4/131409200/zofavid.pdfIn PDF document text
    • http://bltlly.com/11j9lwFree..hollywood..movie..download..in..hindIn 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/1/0485/7030/2629/files/square_inscribed_in_a_circle_construction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/6658/3206/files/75_degrees_fahrenheit_to_celsius.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0722/1661/files/80922468152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7426/1670/files/86429197664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5663/9383/files/financial_sorcery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9652/2398/files/ginefu.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_off0000c862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC862 5832 bytes
SHA-256: c2e925f8531c28247c9b2a721ebb64d95adef1628beb880d1feabb4570483c9b
font_01_sfnt_off0000dc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3F 15496 bytes
SHA-256: 1d3e707c62d291ff59b570fbec1043ab0b5aa5e21c73d7a38af7ecf2a9d04314

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