Malicious PDF — malware analysis report

Static analysis result for SHA-256 9791aaccefac657b…

MALICIOUS

PDF

62.4 KB Created: 2020-10-04 18:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: efe7b60ebbe1a7fd95f04ebf0cdfcc38 SHA-1: 76123d2a6d1f8f7d7fc56d3b8cb3e2087cd5eaf0 SHA-256: 9791aaccefac657b623729c3e666e655afa746910e5e7f47cdb8a838eb8ad1a4
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=kimmy+granger+punished+school+girl In PDF document text
    • http://rotexala.onceuponachristmas.info/uploads/1/3/1/3/131380582/dd1f88f71b.pdfIn PDF document text
    • http://files.stirlingcastleclub.org/uploads/1/3/2/6/132696267/9066249.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/1/0481/7482/5621/files/66939661864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7478/3906/files/75277763595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5651/2667/files/2016_xeno_bat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8414/5574/files/clarinet_parts_stuck_together.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5152/0678/files/33572518902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4175/8101/files/37708211216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/8802/4230/files/el_conde_de_montecristo_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3880/3621/files/colour_atlas_of_parasitology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/icarly_spaghetti_tacos_on_a_stick.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9672/7961/files/create_fake_bank_account_balance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7916/6873/files/jazz_music_critique_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/sigetopilawenamavelerub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/6534/4935/files/fapimajakidawul.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_off00006def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEF 22264 bytes
SHA-256: fc1551648c6d6f87c4daa751c18dc86f0de8ad9c01f95bf94f209c1c8b14c1ab
font_01_sfnt_off0000b3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B7 5556 bytes
SHA-256: daebcfde69527747136a2b2617f7786487c5bdce3f09e6daba1e608e109a42a5
font_02_sfnt_off0000c67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC67D 10504 bytes
SHA-256: 3d9f4d21237f4a9278d9d31fe48bf43ca48e2d814e2588036eea325b8d989237

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