Malicious PDF — malware analysis report

Static analysis result for SHA-256 5573edd7388cacbf…

MALICIOUS

PDF

38.7 KB Created: 2020-10-30 12:01:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 185842b246a278dc3b3d372b5b0849ca SHA-1: a3831c1204b8846794002f163f33ae7be67ed7f2 SHA-256: 5573edd7388cacbfbb1577a564e2f25a43e100093bc194263b2ac3ae8ea965b3
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/aws?keyword=how+to+hack+puzzles+and+dragons In PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/tigosorivibisakoxu.pdfIn PDF document text
    • https://tebamebameden.weebly.com/uploads/1/3/3/9/133997375/gojupogagu.pdfIn PDF document text
    • https://jifilebipik.weebly.com/uploads/1/3/4/3/134375607/pabupugalapupejavowo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f8b0f95d812d.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005812.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005812.bin)
    • https://cdn.shopify.com/s/files/1/0268/8034/4246/files/1116283199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8753/5522/files/68226655322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3804/3031/files/13565067459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/fodosapusebiwix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8881/7562/files/best_football_games_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3200/1691/files/perioral_dermatitis_patient_education.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/5526/4942/files/86516098213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8525/9456/files/patiromizileze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0780/2518/files/teaching_synthetic_phonics.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 extracted file (font_00_sfnt_off00005812.bin)

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_off00005812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5812 5504 bytes
SHA-256: 747ef43f5823037f651dd1be19af038fbde53e085c5c19a23e7f7dfa04b91f4e
font_01_sfnt_off00006ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD8 10176 bytes
SHA-256: f98abfd193be8788f574bec101706a3f494b1388bdfda5c98d186c3157777816

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