Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e6eeb1ea752dff…

MALICIOUS

PDF

40.5 KB Created: 2020-10-13 22:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9c8e6de6475c9a14b842decb42213f9a SHA-1: 5de59e8906ba3fadead3075055af9847c8612ddb SHA-256: e7e6eeb1ea752dff2f0d2388ad84f8b74edb03c659da4a503533cc06dc1ee847
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://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/kezedivalo-bolumukejufufik.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/strik?keyword=vcenter+security+hardening+guide In PDF document text
    • https://site-1042419.mozfiles.com/files/1042419/welujetotikodojowoxeg.pdfIn PDF document text
    • https://site-1044303.mozfiles.com/files/1044303/xuxiv.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/kezedivalo-bolumukejufufik.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/4e0d994f.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/6023986.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9516/7654/files/daniel_gibson_net_worth_2015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/michigan_black_bear_ice_cream.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2065/6033/files/lazy_susan_bearing_pin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c66d644-cf93-4039-b8f1-d001a9fff7d3/wavuxodekaladujibifaloza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b935b2f7-9009-4583-93a3-de5b7961f1e6/50544974881.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E6 5236 bytes
SHA-256: be35305037ac6c4445a0d016327d010be74192a1aba9cdaa29ec8bbb83eb1594
font_01_sfnt_off000072ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72AD 10096 bytes
SHA-256: 14eacacf805dd636b12f75a02099c0040ea98c715e1cd9686e098ab57e0abc12

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