Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a1dfeb7c4401b3…

MALICIOUS

PDF

37.7 KB Created: 2020-11-04 09:15:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: e8ed96c2ad37a9345aa4853ff19b69e2 SHA-1: a4aa32ad6e37dc0b3b9ec9a9fb63ca60e546b069 SHA-256: 36a1dfeb7c4401b3448bf69f79ec29a81d24aef35811e19b668d176aff0a454c
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://ttraff.cc/123?keyword=iron+snout+unblocked+games+76 In PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/xafekodepuz.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/nomaz_lewubetege_xixusepe_mejape.pdfIn PDF document text
    • https://raralulewuk.weebly.com/uploads/1/3/4/4/134478892/4785107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_5f8aefbf2991b.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/819ac2f13.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://uploads.strikinglycdn.com/files/e5749fcc-b7b0-41f3-b1c0-413bced9e4a3/ciclo_biologico_chagas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1934d0e-7056-4532-8bc9-bf73e55a4d5d/meet_the_fokkers_torrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a557a419-c159-4957-8f64-a9281c67f431/vetefikejufutanuverusisob.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/tulasoginokigakep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80fbcbe7-a8f2-4c7a-ac5a-29167efd7094/glory_of_generals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e7c1c8-9d67-477b-980e-08b7f6ef63e1/zonujenekeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/154dde1b-3a76-4785-9a75-e030592cc9d9/education_is_not_the_filling_of_a_pail_but_the_lighting_of_a_fire_plutarch.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_off000048a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48A6 5468 bytes
SHA-256: 90e95e76d096c1324741fc8b9aa3afb0ace9d3d183fbb28cdbbcded76a39f635
font_01_sfnt_off00005b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B26 9680 bytes
SHA-256: 775caf92583fdcf48f5dfffb5bda2702ec87140581bb348bd894854438999323
font_02_sfnt_off00007c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C15 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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