Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a625d3bf0a62ca…

MALICIOUS

PDF

42.2 KB Created: 2020-11-06 19:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 59ec269642cace012702107613d07a17 SHA-1: b3ab3bed48d124a57cd9b26ee815ddbcb68daabe SHA-256: b6a625d3bf0a62ca41b077679d0083f8472378815a6126e25f334d5c73addf45
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/123?keyword=download+lagu+undertale+megalovania+mp3 PDF link annotation
    • https://favesalaliba.weebly.com/uploads/1/3/1/3/131384568/zejepuxerurov.pdfIn PDF document text
    • https://bubawupuga.weebly.com/uploads/1/3/4/3/134380130/razowewimasorutig.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed8c9fa7-ad31-4000-984b-8e0713968636/6688276328.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/medieval_names_and_their_meanings.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/zippo_hand_warmer_gamer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63077ce3-8b9f-4ade-a7d4-775d7a7615ee/mizopobudadikogolofa.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/kifiwaxizolisud.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/projekt_1065_free_download.pdfIn PDF document text
    • https://jepawik.files.wordpress.com/2020/11/22165285235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92544a91-ba70-4b1a-b6af-1b431a59366a/rebomuwibisaxag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fc3ee78-7501-4a40-a9be-51e2ff65971d/how_do_you_say_werewolf_in_french.pdfIn PDF document text
    • https://s3.amazonaws.com/kepevipawit/kiforekofulakivagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/636ab182-18e3-4870-9a04-0667cb2890a2/cinema_movie_apk_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5555 2848 bytes
SHA-256: 6a0ced336f9510fba0f0eeb85e50291979e4470e370158fcf4ae0d61e8c067f0
font_01_sfnt_off000061bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BC 5416 bytes
SHA-256: 44d7ebc9dd6ba6731b7b3ffa4732c4481dbed7764dd5788c3ae07f72f763e004
font_02_sfnt_off00007439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7439 10832 bytes
SHA-256: 219c9b6d31f0bb473cdf8024ab47b431fc8ef11f9834f29102cfec3a669cca1b

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