Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5815fe7e57f8f06…

MALICIOUS

PDF

57.4 KB Created: 2020-11-05 03:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 104d554dc0f2fe999af36ed5a03a42a7 SHA-1: 78711172f0e6c767e391d4f544232a3ba540f544 SHA-256: e5815fe7e57f8f06b0ec771d00a61d345fcddf7b8e41a607db80da74bc4804f4
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/aws?keyword=avogadro+and+the+mole+lab+answer+key In PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/wobibedimozuvi.pdfIn PDF document text
    • https://tusutaxuwipafu.weebly.com/uploads/1/3/4/4/134403355/8f3758e5a.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/3f5a1321857fcf.pdfIn PDF document text
    • https://gokefezenomi.weebly.com/uploads/1/3/4/0/134040807/banone.pdfIn PDF document text
    • https://zelikozuka.weebly.com/uploads/1/3/4/5/134594864/nivenitax.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/039e477d-53df-4d7b-8eb1-336272994c91/the_meaning_of_secondary_economic_activity.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/mirezok.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/bimutupato.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/national_certified_medical_assistant_exam_secrets_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/character_description_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/dalonedukapilasifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b15c491-0aff-4454-a732-c11be25c3664/35949372296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0a38fe3-c0df-4c79-b151-998d1549b2d1/good_travel_guide_websites.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_off000091ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91BA 5428 bytes
SHA-256: add0103ade19f573078085e042ed2dde41a0583301cda25ba363f6528cd063e6
font_01_sfnt_off0000a413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA413 11124 bytes
SHA-256: 835fc5ab10534f67bf1d9e5a3f030f2f1b359d641555afdfb33eacf5647fe2be
font_02_sfnt_off0000ca37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA37 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333