Malicious PDF — malware analysis report

Static analysis result for SHA-256 e400df5dc9793b28…

MALICIOUS

PDF

41.2 KB Created: 2020-08-17 05:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cfa2b400cc075feb5307a6e082ba6d53 SHA-1: 30b8600a54b2653931496cb62fd0b66530cf3c07 SHA-256: e400df5dc9793b288a42ca985e4c6d78b1b75de56ec3afd30cee15478ec2a7b2
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://ttraff.cc/pify?keyword=guide+to+iceland+contact In PDF document text
    • http://files.en.cosmingheorghe.net/uploads/1/3/1/4/131438137/42331f0f0.pdfIn PDF document text
    • http://kekonaro.villageinnup.com/uploads/1/3/2/8/132814930/vebekila-patekamumunovi-gawibonopezabu.pdfIn PDF document text
    • http://dobiken.graciesgowns.org/uploads/1/3/1/0/131070364/2da21cd82ae.pdfIn PDF document text
    • http://fusexa.donslettersfromthenorth.com/uploads/1/3/1/4/131406427/pomopidipaxe.pdfIn PDF document text
    • http://files.ppsia.org/uploads/1/3/1/1/131164168/3141454.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/1/0429/4760/8730/files/zetadusudevosowewotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2974/9145/files/form_st-_105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3473/0911/files/anemia_falciforme_e_valina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7075/7791/files/ditetomiwofazijakikar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/jetinamovomex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/27800355556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/jexolixiveraw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/boy_baby_names_starting_with_s_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7950/7875/files/full_size_bed_sheet_sets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7507/6258/files/66879304718.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000643b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643B 4692 bytes
SHA-256: 94262380689d052705a8b94af0f527a0b446f3ca2ffbe7c2eedc9e8aeb9f7518
font_01_sfnt_off00007441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7441 10412 bytes
SHA-256: cc4b8e7061b93e635210beada8e75973e00ba629b0111ca9e44e5b12a05be119

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