Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b8793f3db1c382…

MALICIOUS

PDF

56.0 KB Created: 2020-10-06 15:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d56615e96694583460784fcfc7e79f3e SHA-1: 93075036a7e72333427943c430596d163cc253ac SHA-256: e5b8793f3db1c382253d3f425302c299a09921373d50f6d61f8e6cc7373e00e0
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://cctraff.ru/strik?keyword=ap+calculus+ab+continuity+worksheet+answers In PDF document text
    • http://zugoj.hogansmusic.com/uploads/1/3/1/6/131636627/9131731.pdfIn PDF document text
    • http://rukezo.hounslowpensionersforum.org/uploads/1/3/0/7/130775835/1239141.pdfIn PDF document text
    • http://wajate.securefire.co.uk/uploads/1/3/1/3/131380183/1731898.pdfIn PDF document text
    • http://files.globalprofessionals.biz/uploads/1/3/2/7/132712209/nugojutu_jakudixolover.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/1/0429/5809/4495/files/kahr_cw9_review_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3295/9912/files/provo_mtc_zip_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2953/1293/files/romegodukati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0754/9338/files/luzovirivazitene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3756/4838/files/genetics_review_worksheet_biology_corner_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/49205936260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5020/0988/files/dagutapojumegeladugovesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/zeziligetijavawukub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8188/3047/files/88400721609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8656b4e1-7d8e-4c16-b4fd-7a3df7f10820/44860079873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8036e450-0280-4b25-b9eb-74139fd04058/55431720616.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_off000086d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D8 5408 bytes
SHA-256: 609531d61c35b0de73d358cac085f59b5f4ff26599d3d485b6a92bdcac3131a4
font_01_sfnt_off0000994a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x994A 10772 bytes
SHA-256: b0c99992a0c51d5175d3d257deaf42509f857a6ddc8585b5b6a789050e341e4d
font_02_sfnt_off0000be2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE2A 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

Open this report in the interactive analyzer, or submit your own file for analysis.