Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7f9d29776a9f08e…

MALICIOUS

PDF

44.2 KB Created: 2020-10-15 01:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: c9fd135d90bfc8a49a3877b474d7f4f6 SHA-1: 577a0a90a2e786399e64d764794cad7d1149dedd SHA-256: e7f9d29776a9f08e38f358f8494c7ae6a976ad57b11aec7c263a38ff90972876
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=antrenmanlarla+matematik+geometri+pdf+indir In PDF document text
    • https://site-1038493.mozfiles.com/files/1038493/36432686069.pdfIn PDF document text
    • https://site-1044067.mozfiles.com/files/1044067/noxalarutuporaw.pdfIn PDF document text
    • https://site-1038919.mozfiles.com/files/1038919/razegajefivafimawazam.pdfIn PDF document text
    • https://site-1040559.mozfiles.com/files/1040559/96963031922.pdfIn PDF document text
    • https://site-1039656.mozfiles.com/files/1039656/11879238511.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/38c349888bb2ad.pdfIn PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/5272009.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/7922058.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/zabajufu-femudana.pdfIn PDF document text
    • https://site-1040326.mozfiles.com/files/1040326/27862663937.pdfIn PDF document text
    • https://site-1042604.mozfiles.com/files/1042604/mazesedodidovizone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5f876bd16cb1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f8766e972251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f8775ca8cf1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f87762075824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f8776703db26.pdfIn PDF document text
    • http://cinurl.com/1c5rfrUNITIn 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/1/0266/8091/8203/files/22756738127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2199/8496/files/tamakoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/6951/4404/files/68815740773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1088/2716/files/11197739818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2251/5865/files/69769129571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1037/4810/files/wuxivapafaweti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5581/6090/files/1.5_iqr_rule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/29152621496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5008/5781/files/mepanezegupenu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB2 3284 bytes
SHA-256: ca690bdbc65248bd3290612f8bd031f0cb1a8b5c08eef49af0e76c6184113939
font_01_sfnt_off0000684c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x684C 5236 bytes
SHA-256: beb339af2d8dc2ff222ae833558bcf663e40c588c62a546ecb65d63aae2223e8
font_02_sfnt_off000079fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79FE 12384 bytes
SHA-256: 53be604e7bb70f13397c3ff3c3ae230868384928271e9722c25f3c6553fdb384