Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d363de9da6f865…

MALICIOUS

PDF

45.8 KB Created: 2020-11-06 22:19:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 57c78cb759d6e7b8bc0f71ae97be62bf SHA-1: bb4580193303767ce4cf719633379f9bdefa0d6a SHA-256: c6d363de9da6f8651c4afa016d36817e902fdd568e6db931a1fb11a503c936c1
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document functions as a lure for credential phishing, impersonating Facebook and using a conversion tool as a pretext to redirect users. The embedded link directs to a redirector chain that ultimately leads to a phishing page. The document also contains a large number of links to external PDFs, likely for SEO manipulation or to host further malicious content.

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://narogigadi.weebly.com/uploads/1/3/0/8/130874066/c2099e721b.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://traffine.ru/123?keyword=convert+150+fl+oz+to+gallons In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_5f90b7a93c325.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/c2099e721b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383913/normal_5f9fabda59326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_5f8cbaf7b1fbb.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/9f28e3dd0b98e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5f889612846d4.pdfIn PDF document text
    • https://porimejonawi.weebly.com/uploads/1/3/4/3/134368737/turulema.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387419/normal_5f964dd2544ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f929727a19c4.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/646534.pdfIn PDF document text
    • https://bigarafomamuwi.weebly.com/uploads/1/3/4/3/134318607/1de04445924.pdfIn PDF document text
    • https://tozowibalap.weebly.com/uploads/1/3/4/3/134383498/b0b28e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00005f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F20 5268 bytes
SHA-256: 6f7b0aabcdb184fa4b7d64f834d65451de149772088403619acb82ad32768707
font_01_sfnt_off00007136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7136 10368 bytes
SHA-256: 35920f28cb7e408152b45362b612decb158e9d4ca24d1f1b11cc65edb71ed86b
font_02_sfnt_off000094a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94A6 16216 bytes
SHA-256: 5cb4188777f33cd410073f8b9d14bcb5a62f3956273c75e1cc66e568e6902af1