Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7243a4fe378dfe…

MALICIOUS

PDF

48.5 KB Created: 2020-10-31 15:51:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9404aba65e338d0b6e2c96b985a80b49 SHA-1: 7e456a23228c1bc6080661db69391e1fc6419a87 SHA-256: ce7243a4fe378dfe73a75aa4a445e1394c6cd479189fa9f5d11daf16fe806a0e
154 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=l+brands+login+aces In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382952/normal_5f9282fe31c8c.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/dfe5471fa8.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/liloxu_tewogeti_gujerorubokimug_nekibunufigi.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/72e37.pdfIn PDF document text
    • https://zinawadasug.weebly.com/uploads/1/3/4/3/134312837/bulodifif.pdfIn PDF document text
    • https://bodadesoka.weebly.com/uploads/1/3/4/2/134234706/5292943.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/224cb7bf-e2c8-476c-91aa-b4e0886adb1f/skrillex_first_of_the_year_equinox_m.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4e74747-6b28-4f61-a1da-8d1ca5254b22/petarovat.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/pumojaferuzumofi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A2 5188 bytes
SHA-256: a62ab2b8a50036248d2e0ebd7c35d8377ac32e22d0bf22e9c321d8604897670d
font_01_sfnt_off00007656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7656 13456 bytes
SHA-256: d42840435d76acab2d94d7d22060599e31662a4b2a71e1001d882ca94c9cd830
font_02_sfnt_off0000a046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA046 16132 bytes
SHA-256: 43e84046d57c5d8edad47de9228ce36feb53c5e515436c294a71041590f3a3a6