Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b9cc5b53cf032b…

MALICIOUS

PDF

32.6 KB Created: 2020-11-01 05:12:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3e2b4d6f2d5de4b52fa61792ed237918 SHA-1: b54138e91e2a6e0040231fdc6a7fa4fc27968585 SHA-256: c6b9cc5b53cf032b9ad97e91149505cfa61a6e62df8d2f0ccfd598c5a75cc1ad
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous embedded links, with a critical heuristic identifying it as a redirector link to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'free amazon gift card code generator apk'. The presence of a password archive lure heuristic suggests the document may be intended to trick users into providing a password for a subsequent payload. The ML classifier also strongly flagged this PDF as malicious.

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.
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://gettraff.ru/aws?keyword=free+amazon+gift+card+code+generator+apk In PDF document text
    • https://lejigatoni.weebly.com/uploads/1/3/1/8/131871980/defetubako_jugikefaze.pdfIn PDF document text
    • https://dekobela.weebly.com/uploads/1/3/4/3/134332871/3f38043846e9eb.pdfIn PDF document text
    • https://xotiroxo.weebly.com/uploads/1/3/0/7/130776105/bupux.pdfIn PDF document text
    • https://sexutenevasasi.weebly.com/uploads/1/3/4/3/134306733/2821101.pdfIn PDF document text
    • https://sudewivozuv.weebly.com/uploads/1/3/2/3/132303071/8281828.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/nolarerav.pdfIn PDF document text
    • https://wevinavuligi.weebly.com/uploads/1/3/4/5/134505150/dataz.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/1/0502/2223/5826/files/doxegifipigubedigajoki.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/hatsune_miku_dress.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7219/9062/files/roludasazurajipe.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/nijujobebuxigisazibe.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/the_reaper_book.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/cattle_breeds_india.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/concept_of_sustainable_national_development.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_off00004440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4440 5336 bytes
SHA-256: fa6129cc2a80732a08644603591c8ef55f70b8cc252202b5b17645cfda3aed08
font_01_sfnt_off00005663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5663 9188 bytes
SHA-256: 515577c1b9a93d84699028cd35f4f6fdf1f408cc4887ea290bdc5fd731f68a73

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