Malicious PDF — malware analysis report

Static analysis result for SHA-256 6942eab739c901f4…

MALICIOUS

PDF

50.9 KB Created: 2020-10-04 20:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: fbc49b2a26757b6b2decafb777c923e2 SHA-1: 5dcd683adae5255ff26249e62f315040428b8fda SHA-256: 6942eab739c901f424531027e3a52a6df56ee9b1bb778053cf3a998d52f4f70f
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/strik?keyword=english+grammar+beginners+pdf+free+download In PDF document text
    • http://files.cellar27furnitureco.com/uploads/1/3/0/7/130776033/2490977.pdfIn PDF document text
    • http://sukaj.eunsookim.com/uploads/1/3/2/6/132681393/e35b465bb.pdfIn PDF document text
    • http://lowofurep.fawnsartstudio.com/uploads/1/3/1/4/131438539/2595990.pdfIn PDF document text
    • http://files.bassetbuddiesrescue.org/uploads/1/3/1/8/131858108/fofunik_gusonefe_tamulo.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/1/0430/8529/9876/files/bomberman_apk_mod_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5109/6984/files/231751363.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/carlo_robelli_guitar_acoustic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8500/2920/files/cypress_woods_high_school_band.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7204/8290/files/31060395409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc78d6c5-b1b0-4cb8-9b32-176354220d71/golorimajolage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acd17cef-8fed-4be7-9692-81d2963df3eb/61559181471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4659/9845/files/teen_wolf_season_4_episode_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5814/2120/files/dachshund_colors_blue__tan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1019/5097/files/sopedok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6794/6648/files/repez.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 5

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_off0000875b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875B 5644 bytes
SHA-256: 510b628c7048d5c3e5d7f0de8872e2ff8b7ba5b8d9a65144be94ea37be8fc28a
font_01_sfnt_off00009a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A70 10464 bytes
SHA-256: 2a35c3c1357af5ca63aa3edfc1cdb78e9312f0442a843a903aaddab19229d5fe

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