Malicious PDF — malware analysis report

Static analysis result for SHA-256 7911a900c6d572dc…

MALICIOUS

PDF

50.8 KB Created: 2020-10-03 20:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: b2cc9887a7fb0d888425f7f023ec7ee6 SHA-1: 59a7a5a3be6028aa11ae12d1361bac788ce2f21b SHA-256: 7911a900c6d572dca05b1e5023c53f74470d345fbf9f72a5c14c905f62530ad3
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/pify?keyword=graffiti+names+that+start+with+r In PDF document text
    • https://site-1037028.mozfiles.com/files/1037028/povuxuzokinedugudap.pdfIn PDF document text
    • https://site-1038527.mozfiles.com/files/1038527/mopuwujafatedutulubu.pdfIn PDF document text
    • https://site-1038541.mozfiles.com/files/1038541/roxilakaxarexuronodaxoj.pdfIn PDF document text
    • https://site-1039806.mozfiles.com/files/1039806/1404947525.pdfIn PDF document text
    • http://fixej.thepeachbee.com/uploads/1/3/1/6/131636725/rezuzuw.pdfIn PDF document text
    • http://files.psychologycenterofaustin.com/uploads/1/3/0/9/130969474/bevofo.pdfIn PDF document text
    • http://files.nejumpersassociation.com/uploads/1/3/1/3/131380504/4991306.pdfIn PDF document text
    • http://files.charlestoncob.com/uploads/1/3/0/7/130739052/f636699f1f.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/1/0437/5111/2858/files/never_let_me_go_chloe_walsh_epub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5323/6902/files/alpine_cda_105_manual_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0697/1032/files/79560081294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8881/9864/files/47364433427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7895/4389/files/audifonos_beats_x_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/6414/4284/files/26804634928.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1847/2600/files/walter_french_bulldog_meltdown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5912/5153/files/2002_mitsubishi_lancer_oz_rally_owners_manual.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_off00007ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA4 4776 bytes
SHA-256: ef81549230e78cb2e07593a743a09930249e0b6442a6c478ba98d616f815e24d
font_01_sfnt_off00008cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB2 10316 bytes
SHA-256: 789ebd9aa19443a13488335ce44d17e85479a42e380fae98f6db83d38128869f
font_02_sfnt_off0000b01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB01E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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