Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a9d3f7262e4920…

MALICIOUS

PDF

70.6 KB Created: 2021-01-29 21:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f82ccf6a51368110c7fb7592258bb48b SHA-1: cc964ae49795ce85fa6cf9c6bf77633a3433bc01 SHA-256: 82a9d3f7262e4920a3da8b10fcb2509d002956f62d6da3e512c51eb5a1dfb19a
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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
  • 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/aws?utm_term=ppt+templates+timeline PDF link annotation
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/vajuwedetuw.pdfIn PDF document text
    • http://homebig.space/572292277891godq.pdfIn PDF document text
    • http://copyrightshelpscenters.com/gastroenterologia_booksmedicos6jjny.pdfIn PDF document text
    • https://nevutero.weebly.com/uploads/1/3/4/7/134716167/4484304.pdfIn PDF document text
    • http://fitokaps.xyz/senate_polls_by_state_mapzg4zg.pdfIn PDF document text
    • http://helpcontactform.com/stardew_valley_growing_grassf067v.pdfIn PDF document text
    • http://demask.fun/write_thai_vowelsu8pt1.pdfIn PDF document text
    • http://mihetos.xyz/611484012620ozgh.pdfIn PDF document text
    • https://falosaxosudo.weebly.com/uploads/1/3/4/0/134017699/fabolurokifo_dofat_mogemeramugik_tanobokoxolidu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nowonovege/kakom.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/vukolapopogofuzegip.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/repalubavaxalebuxufafu.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/battle_chasers_nightwar_fishing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/nakutezegorudalek.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/gasolepelemupokanifude.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_off0000d8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DC 4868 bytes
SHA-256: 701257ad60cc4daeffa21aa8c0a90d665445cf3d44b9cb48583e24249cc091cf
font_01_sfnt_off0000e955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE955 10716 bytes
SHA-256: e0621432f49f1921c27dcf45f266e4520bbff6311258a726f84190070e1b0d62