Malicious PDF — malware analysis report

Static analysis result for SHA-256 917351d532575e8c…

MALICIOUS

PDF

72.7 KB Created: 2021-02-23 15:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6a890cd49720da66b9b70dd8a8ea9b2b SHA-1: 1295f0e0ad139a3fb6016b0d4347c5681634cb11 SHA-256: 917351d532575e8c2209280f096bcb45993d0bf5b5ff6e61bae1f24652e8bd82
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=lesion+elite+gun+skin PDF link annotation
    • http://lotsmen.com/xozosoravalidenoselowanewka629.pdfIn PDF document text
    • https://pegufozexak.weebly.com/uploads/1/3/5/3/135317465/rugolimegozedisaru.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/ihdjahe/53192573298.pdfIn PDF document text
    • https://cdn.sqhk.co/dimumaneda/icjb2ii/baduwitopogorerekakunuw.pdfIn PDF document text
    • https://cdn.sqhk.co/bejadelu/hiihijf/debuxegod.pdfIn PDF document text
    • https://cdn.sqhk.co/wupofolizaj/dibhfkM/45650755728.pdfIn PDF document text
    • https://sejumajofejopib.weebly.com/uploads/1/3/2/7/132740214/d2085a.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/eji97jf/rechargeable_aa_battery_with_charger_price.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/djdrigp/online_marketing_business.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/bifadiwuwileji/flood_insurance_underwriting_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/android_google_reverse_image_search.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
stream_002_off0000c8ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC8CA 7496 bytes
SHA-256: f4b29c5263668df5eefc8ae9a8d7dd75bfe57b1499069059dd82049c4a27514c
font_01_sfnt_off0000e212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE212 4552 bytes
SHA-256: b8caa5bc9701a49c355e1692dc913112d5d9d31d2e580d5db3d42b8f46c1bde1
font_02_sfnt_off0000f1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AE 10664 bytes
SHA-256: 2a438682e4c3af6202707d23eb6cfc33374f01402f7eeb62d3cb7067c0189445

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