Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a94602a129869e…

MALICIOUS

PDF

70.6 KB Created: 2020-11-09 14:44:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 38988b8af157b6d321fd5ad65416ae7f SHA-1: 894391f244e3ceca53e3da861dd0e459e05fcf1e SHA-256: f1a94602a129869ed33167119cc2d9386fda1b8374b77420c36d07f2eadadf7c
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://traffine.ru/aws?keyword=the+great+saiyaman+3 In PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/3702811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409797/normal_5fa541340ad23.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/nikusuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405902/normal_5f95fae6b44e5.pdfIn PDF document text
    • https://dodawuwaxa.weebly.com/uploads/1/3/4/3/134305805/5052eb712e08.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://s3.amazonaws.com/metakibeme/95370117077.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/aba_negative_assurance_letter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eaee076-d721-4293-a586-d4b26c74e44a/levosemutukofedixokumo.pdfIn PDF document text
    • https://s3.amazonaws.com/remoxi/69365508368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42373c8d-65e9-4752-be20-00d7265cdcba/11317700515.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/45527218275.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/65338528294.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/57315917297.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/12_channel_adc.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB59F 4992 bytes
SHA-256: e94cbde7767afa0c75de3ece1a276d1418b85a47c498803ac0d1de35f876eb0f
font_01_sfnt_off0000c6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F3 4960 bytes
SHA-256: 2b85f853747712cbd0b564e901bdf83e647deb0ac4ffe31ade249d000dc19ed1
font_02_sfnt_off0000d7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A9 11748 bytes
SHA-256: 72da9dfec064f88d1be5d157542760ddb42bd4182ab462b7ef56dcbf2ffcc70b
font_03_sfnt_off0000ff3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2