Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7ebc22adbcf714…

MALICIOUS

PDF

68.1 KB Created: 2021-02-24 13:50:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a24f2e08e16623344816316c6989e036 SHA-1: 23552cd38f7e2c7a95f01ba3a601985da2e23ef7 SHA-256: fb7ebc22adbcf71404cbe4db5e5d65e906865302dba40b6e4c42552a0f594d8e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/wix?keyword=trolls+world+tour+2020+dvd PDF link annotation
    • https://labekefetimobu.weebly.com/uploads/1/3/0/7/130739294/pozim-memile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481667/normal_5fd27b5809be1.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/iijashe/8954066254.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414688/normal_5fcef56e43505.pdfIn PDF document text
    • https://raxelapanaf.weebly.com/uploads/1/3/4/7/134746791/sinewekosixor_pogutob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370265/normal_601050f55b63e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443357/normal_5fd7aa9195dbe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lolaritemukole/48991991151.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/mogekikuwaxadu.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/gilliam_autism_rating_scale_3_sample_report.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/nazupixo.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/69971325051.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC13B 4596 bytes
SHA-256: 8fd705986f88d510dee19a3f12cef2814ed1694903d6ac85c76498af522ab1e2
font_01_sfnt_off0000d103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD103 10332 bytes
SHA-256: 3cfb384b894149c07866b3b0cd9fc91deb60a83951e89bc86578a19c33477e41
font_02_sfnt_off0000f443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF443 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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