Malicious PDF — malware analysis report

Static analysis result for SHA-256 018341380a9ff7b5…

MALICIOUS

PDF

39.7 KB Created: 2020-10-05 13:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: f967a1051edcf8c2b454fe8841e8ebd9 SHA-1: f516657238a5d54bd9df7a3766f6cb93ce4858a9 SHA-256: 018341380a9ff7b5af62ed7c0c6b6e14a5d829789de894cee58c84eae02dd986
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=hypothesis+independent+and+dependent+variables+worksheet In PDF document text
    • https://site-1037870.mozfiles.com/files/1037870/zonijasimifofoxemesasekib.pdfIn PDF document text
    • https://site-1038478.mozfiles.com/files/1038478/379864562.pdfIn PDF document text
    • http://kidas.americanfriendsofthefatherbashfoundation.org/uploads/1/3/1/8/131856887/vodosepeja.pdfIn PDF document text
    • http://files.gabesta007.com/uploads/1/3/2/7/132712093/6144052.pdfIn PDF document text
    • http://files.yuukan.com.au/uploads/1/3/1/8/131856173/061d89af9.pdfIn PDF document text
    • http://datogow.startin2drive.co.uk/uploads/1/3/0/9/130969723/goleloxoso.pdfIn PDF document text
    • http://saserifeb.francesmcmahonward.net/uploads/1/3/0/8/130874629/7c43a9eb.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/1/0436/4907/3312/files/rubigodolefujutozivofovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6753/4229/files/federal_rules_of_evidence_101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0642/6275/files/nekiges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2139/6891/files/biological_half_life_of_iodine_131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6512/1699/files/door_in_the_face_phenomenon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6914/4230/files/bra_sizes_picture_chart.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C97 5468 bytes
SHA-256: 0b8b278a64b5006fd8b4b56e334a9745f7dfa59da8fe60d09e9d995ca4ee829b
font_01_sfnt_off00006f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F37 10000 bytes
SHA-256: 4a237661a5eebd3e1c710fb65cd57ba5f852328f701d3e03e6f76af137a8ee2c

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