Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a9f6e996bc8ed9…

MALICIOUS

PDF

47.5 KB Created: 2020-11-08 02:12:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: e41c678f8d74385854956d3bbbe507a6 SHA-1: 76498fe6f90ea7bacb59a22a25f15888badc3999 SHA-256: 52a9f6e996bc8ed95f986f9279c84b0323a89f8563b91ab71b6911128c8f9f22
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/wedazugibekud-perapivamopep.pdf.
  • 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://traffking.ru/aws?keyword=degree+of+polynomial+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384655/normal_5f91c1c8c0286.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/wedazugibekud-perapivamopep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_5fa72ccd4bf62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392195/normal_5f919f8c01f96.pdfIn PDF document text
    • https://niwewuvikade.weebly.com/uploads/1/3/4/6/134629185/5257117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5f8a81d44d9d0.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
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kavalukato/pogil_answer_key.pdfIn PDF document text
    • https://zeladup.files.wordpress.com/2020/11/nato_stanag_4370_environmental_testing.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/physiotherapy_treatment_for_cervical_spondylosis_with_radiculopathy.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/65779764599.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/43462047963.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/fuxajoriguba.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/cambridge_latin_course_book_3.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_off00005ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF6 3076 bytes
SHA-256: e17680c1750bec15395fac6becb5fa0647de3792b7aecb270ce99ca3d609e023
font_01_sfnt_off00006be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE0 5360 bytes
SHA-256: 89f94449dd4b70924654cd6461e68dc4700bf816177beb1f06122c2cb1172263
font_02_sfnt_off00007e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E07 10756 bytes
SHA-256: dc5f9a293958f6cfd945b7ad587033bfca9b3c0cdeb9f0868e1c062f4077dea2
font_03_sfnt_off0000a2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2BD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3