Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e8679b3274de5b…

MALICIOUS

PDF

48.2 KB Created: 2020-10-27 20:35:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 07b9db063087e0399a5f812f68ee120e SHA-1: e968763366e2e322ccb60c78167eaddc55f54e74 SHA-256: 80e8679b3274de5b1e9bcc478979ceff1c33008d34f1162b90d7912180af96bc
194 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 malicious URL, identified as a redirector for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs, suggesting a link farm or redirection scheme.

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://ggtraff.ru/strik?keyword=andover+mills+platform+bed In PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/xovilefuladoku.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/5a79c0d257213.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/vuwuzozoxodav-gizoru-lexipapakofobal.pdfIn PDF document text
    • https://sejevijuwev.weebly.com/uploads/1/3/2/7/132712154/01dbf4bb71.pdfIn PDF document text
    • https://panasijizikefiz.weebly.com/uploads/1/3/4/4/134446590/jawewemubed.pdfIn PDF document text
    • https://busozovamifolak.weebly.com/uploads/1/3/4/2/134235369/2870756.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/0ce135b7523b57.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/7268132.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/8369908.pdfIn PDF document text
    • https://rovumixonisi.weebly.com/uploads/1/3/4/0/134012407/0c3bab3d776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377410/normal_5f8bd8e0d7441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f972c446f2e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/75092062730.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/78180291454.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/46443316098.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/vexabamumuvilelozi.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/the_haunted_hill_house_book.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/arc_welding_machine_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/zezawaxolowepod.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/aggregation_induced_emission.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/balanced_diet_file.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_off00007cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD2 5376 bytes
SHA-256: 0ce44c777d40b1971edc40db679874b94158cd6969dd307f029ed07f2db9fec4
font_01_sfnt_off00008efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFE 10916 bytes
SHA-256: c0a1e560fc64431c21ace2387228bdcb2dbb25e1a2a0891c3fed803c6c2de10e

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