Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe5bdad1a249621…

MALICIOUS

PDF

44.2 KB Created: 2020-10-30 01:02:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: cf96612dcbe6f0061519e15a80420570 SHA-1: 79819df559cb0c722eefcf014ef3f3702a807753 SHA-256: 9fe5bdad1a249621467e047dcd442c41e3c274936212aa7c745e5bf6535a5e4f
282 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 8

  • 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://dopikilazobowu.weebly.com/uploads/1/3/4/4/134488506/leneni-kokaro-wagugazuvag.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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=minecraft+redeem+codes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_5f9a15fbe74e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394071/normal_5f9279166c619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f960f0eb30ee.pdfIn PDF document text
    • https://dopikilazobowu.weebly.com/uploads/1/3/4/4/134488506/leneni-kokaro-wagugazuvag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5f88c29251242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5f916641d0798.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384480/normal_5f9823cf1bb8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379602/normal_5f9106c24c868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_5f8b7506ca711.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000619c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000619c.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off000095db.bin)
    • https://s3.amazonaws.com/zuxadol/xetiruvezuveronavopex.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/liberty_high_school_frisco_rating.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/acuerdos_de_bucareli.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/buzodibapatatude.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/lodekazanaluvi.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/46604103192.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_off0000619c.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000619c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619C 4928 bytes
SHA-256: b5db8aa84b6850048f79c390dd113ee6abe6be7c5bdce3aa13603a492c43e2e9
font_01_sfnt_off00007239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7239 10724 bytes
SHA-256: 758b0cf2bd8cdcdfd41416466b9fe2c316ea76528ba28f04f383483b00e68f06
font_02_sfnt_off000095db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95DB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176