Malicious PDF — malware analysis report

Static analysis result for SHA-256 62123fe170078a10…

MALICIOUS

PDF

40.1 KB Created: 2020-10-09 00:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 720f3be54af7fb54f38fb1a91e9d0da5 SHA-1: f262c069c3cf88e10ddd5c76e9c977e944ba9684 SHA-256: 62123fe170078a10d5f16f0bc0c15445b7845f83d8158cb12e35254d7f9cf9f0
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=a+view+from+the+bridge+pdf+free+download In PDF document text
    • http://degel.andrewtozerfineart.com/uploads/1/3/1/3/131384771/8ee5cba83c6af08.pdfIn PDF document text
    • http://files.armstrongsinvestigators.com/uploads/1/3/0/8/130813135/3621328.pdfIn PDF document text
    • http://files.aimeemsands.com/uploads/1/3/1/4/131406270/selagowuja.pdfIn PDF document text
    • http://junir.frenchvintagehifi.com/uploads/1/3/1/4/131453574/a67669.pdfIn PDF document text
    • https://site-1041862.mozfiles.com/files/1041862/85673391819.pdfIn PDF document text
    • https://site-1039646.mozfiles.com/files/1039646/94155320368.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/1/0431/7485/4812/files/elementary_statistics_a_brief_version_8th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5717/1618/files/18647417789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8878/2506/files/givotorufawudiwiverivugud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8433/2710/files/91254374969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6008/0039/files/briggs_and_stratton_675_series_190cc_parts.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000492d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x492D 5560 bytes
SHA-256: b63ffb52d282bdfb6c7935207e9e74f7508660e1284a6508d62c87d233975858
font_01_sfnt_off00005bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFF 10092 bytes
SHA-256: 95b29cf77c638b94e345bfed1a6d3e3679a40e16e3dad0270aaabedb669c9f3f
font_02_sfnt_off00007ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC0 16060 bytes
SHA-256: bb4620ae2308066493f479cb0495314a41e91f5b0bfb2a754d9bad2ef34af03d