Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bcc482a40c07024…

MALICIOUS

PDF

73.2 KB Created: 2021-02-26 13:19:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e584661448ccfd726a1090cfe78c4045 SHA-1: 772fa46f1bf7d944360c63cec2defccb1425531c SHA-256: 7bcc482a40c0702489ef8ca028e8e97704b3c5066096a6b86ad7b51a100ebd15
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/award?keyword=how+to+turn+on+dyson+dc39 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458856/normal_5ffa77f55d4ee.pdfIn PDF document text
    • https://wugebanog.weebly.com/uploads/1/3/4/7/134709888/9534086.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374199/normal_5fceafb7d8e07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384644/normal_6024cdd3619e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448328/normal_6004fbe9ab1ac.pdfIn PDF document text
    • https://dafizigupiteg.weebly.com/uploads/1/3/4/4/134492389/6280625.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484610/normal_5ff949bea0e2c.pdfIn PDF document text
    • https://dujizajep.weebly.com/uploads/1/3/4/7/134704211/78d02788f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385853/normal_5ffa8a1d872cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447640/normal_600e05a21fc39.pdfIn PDF document text
    • https://jaluwaxigesife.weebly.com/uploads/1/3/4/6/134640648/zumegu_tixuso_ponafipozafot_kuxidikebul.pdfIn PDF document text
    • https://waniritapi.weebly.com/uploads/1/3/0/7/130739375/6726a2ed0dbd9.pdfIn PDF document text
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/1014432.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388272/normal_600065e25f100.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502870/normal_5fce0da191b7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478716/normal_600476d51565f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wutodabegaf.epizy.com/lirexitibukegoboxo.pdfIn PDF document text
    • http://buvizukiwixo.rf.gd/7439855046.pdfIn PDF document text
    • http://napizexem.rf.gd/trane_xv95_filter_size.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_off0000e10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10F 5168 bytes
SHA-256: 43b90e5a2528e9936f23556e6d439c2c38d2ca7190c2725e907b4f75988a35c2
font_01_sfnt_off0000f2c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C4 10768 bytes
SHA-256: f497c9ab69fff7b13103c87df1451ebd82f5e1ede956f394388c9bd968ebf3c4

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