Malicious PDF — malware analysis report

Static analysis result for SHA-256 8717562952c45fd4…

MALICIOUS

PDF

44.9 KB Created: 2020-10-12 14:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f925f913b98d5d8ee65c5fa78f995fb2 SHA-1: 6a55e89dc84cda2297f12416f4cfed251e6e2236 SHA-256: 8717562952c45fd4c6a329968215aae56574ee3898d4725ddc364137938d8da8
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://ggtraff.ru/strik?keyword=taste+receptors+on+tongue+pdf In PDF document text
    • https://site-1042104.mozfiles.com/files/1042104/905637966.pdfIn PDF document text
    • https://site-1039675.mozfiles.com/files/1039675/fubetaxa.pdfIn PDF document text
    • https://site-1036735.mozfiles.com/files/1036735/64415741510.pdfIn PDF document text
    • https://site-1044473.mozfiles.com/files/1044473/9201731900.pdfIn PDF document text
    • https://site-1043375.mozfiles.com/files/1043375/disexixujetijazinus.pdfIn PDF document text
    • http://files.alfheimigs.com/uploads/1/3/0/7/130776393/tarejiledev.pdfIn PDF document text
    • http://files.micksmobilemusic.com/uploads/1/3/1/8/131856382/6945537.pdfIn PDF document text
    • http://kapusi.agardenforknitters.com/uploads/1/3/0/7/130775826/6470946.pdfIn PDF document text
    • https://site-1039919.mozfiles.com/files/1039919/5363173103.pdfIn PDF document text
    • https://site-1041862.mozfiles.com/files/1041862/nekorelufavebufur.pdfIn PDF document text
    • https://site-1040259.mozfiles.com/files/1040259/sikunutejufetito.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0492/7743/6060/files/temad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0407/3883/files/free_download_alabaster_girl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0041/3346/files/stem_changing_verbs_practice_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/the_hadal_zone_is_associated_with_deep-ocean_trenches.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0780/6112/files/onlinemoviewatchs_com_telugu.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_off000064c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C4 5076 bytes
SHA-256: 53918f5d9147b5d56fed3413de9c98630122e3066874f649fd4ee9489dbbe983
font_01_sfnt_off00007607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7607 10164 bytes
SHA-256: b762d6ca5a68fb84c13b06eab1a390ac7e50f89003723ee2eebcd6b4c904a752
font_02_sfnt_off000098ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98CA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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