Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc707839e0c3a14…

MALICIOUS

PDF

40.4 KB Created: 2020-10-15 23:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 92005f764991af3054993d420778ee0c SHA-1: 6b3bbb98da1a75d1e22d376bfb6463d46dcdb496 SHA-256: 1fc707839e0c3a14dfcbb4c56e52faea1cd1f17d4fd7e68595ff807821a3c274
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://ggtraff.ru/123?keyword=gcse+maths+quadratic+formula+worksheet In PDF document text
    • https://site-1042976.mozfiles.com/files/1042976/78963687945.pdfIn PDF document text
    • https://site-1043696.mozfiles.com/files/1043696/59446916902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f8747a16386e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f87cadede5a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f86f55149c0b.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/1/0268/6717/1508/files/kingroot_all_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2871/5936/files/tazumukepovodan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0518/0576/files/16371618747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6354/8833/files/jesus_teaching_on_prayer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8717/9160/files/59506627827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8827/1773/files/77763720504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6705/5521/files/togejoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8944/0157/files/legonazivabokezekebanad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6211/1637/files/nodikepolafisuzizexid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0011/0999/files/deroforajesip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5272/7972/files/61832816341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1412/2404/files/pegeviwakitalopipim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1050/6404/files/3470830321.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 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000516c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x516C 5352 bytes
SHA-256: 69d762a41d9d7f95f80eeb517fbb5203edb5f68d4314e6feb8854fc1bfd5c416
font_01_sfnt_off000063ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AC 10136 bytes
SHA-256: 9d1421cf3c3137652599066c979d50e1cb41b94436ede335d25f347c733cad6c
font_02_sfnt_off00008669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8669 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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