Malicious PDF — malware analysis report

Static analysis result for SHA-256 d80e12fc849eadd9…

MALICIOUS

PDF

45.2 KB Created: 2020-10-29 04:14:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: ecac1a078ef6117e7883b47ba76a3fc4 SHA-1: 16481a22e14e3f31809821a4a4cfccca283a2497 SHA-256: d80e12fc849eadd9bb8c1d5004ab9f60072c184887f66016b8f6e43dcc8e64f9
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://nifadajenekipib.weebly.com/uploads/1/3/4/3/134305148/fidupejeraful_goxumawa.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://cctraff.ru/aws?keyword=minecraft+crossbow+vs+bow+damage In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371248/normal_5f897e2d432f4.pdfIn PDF document text
    • https://nifadajenekipib.weebly.com/uploads/1/3/4/3/134305148/fidupejeraful_goxumawa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392453/normal_5f9691b65187d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412896/normal_5f95029016619.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006f73.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006f73.bin)
    • https://s3.amazonaws.com/dejolavubukugeb/engineering_as_social_experimentation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19487252-0998-4998-a0a0-670b1ab67194/14711848867.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/sekedelijila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4785735-45c1-4b39-90a2-aeb43f0a9db8/begepunekabawun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ca20a98-77ef-4663-8409-666835f7a3db/lotividu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9770/1017/files/rpt_bi_tahun_6_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6656/2966/files/freelance_android_developer_jobs_in_kolkata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe18650f-ddbc-467e-9c39-8fafedbe0873/jipedomuzufufuvomim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d25ad17c-bdef-4f35-8190-cdf186e7cb33/zetele.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/degejesibogavaz.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/12986296268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ffc260d-a8e5-4a48-b66b-97839f41200f/87168053678.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/jesakajereka.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 extracted file (font_00_sfnt_off00006f73.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F73 5604 bytes
SHA-256: 8ab7260e354844a34c7614eeeeb4fa19d5a33d148416beb2e2c7893523dea5cc
font_01_sfnt_off00008294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8294 10836 bytes
SHA-256: 31caaf834548daef95fe531f154b037fd5601936e39082851a13a4f7aaf3d57e