Malicious PDF — malware analysis report

Static analysis result for SHA-256 756d2b9bddc50262…

MALICIOUS

PDF

60.5 KB Created: 2020-11-14 08:00:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 88452b05115205fa4c7d0e0fd90aad43 SHA-1: 36c00ea8c51e5aef8ed70fb7ae8e7d8ddff30ab8 SHA-256: 756d2b9bddc50262947d85461f8b805e6283c5c0dd633d13ee7445ab4865d556
254 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
  • 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.
  • 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.
  • 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://traffmen.ru/strik?utm_term=simbologia+genograma+consejo+mexicano+de+medicina+familiar In PDF document text
    • https://fanamariruzatad.weebly.com/uploads/1/3/4/5/134514157/netasedenurusikaka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417813/normal_5fadb9ec3a889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403806/normal_5fa86ec681e8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478961/normal_5fab6f1ec76a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387052/normal_5f9e933a38150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403947/normal_5fa5b2985f4da.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa47ddbc-164c-4367-b36f-d029d1d7a7d1/febikapafasezebotejamek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/097cde1b-ba09-428b-a20a-4e10d62d2d36/that_lucky_old_sun_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/250dd35d-a556-4aeb-98e7-851eeb4ed418/84742641261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e581146e-da65-4129-92e8-25e66282047e/48666134620.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/39501185350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b0c870-2461-44e0-a08c-8d9014356a16/gorujitupesuwabitetom.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/heated_rv_water_hose_canadian_tire.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/83215172084.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/94811564723.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_off0000b00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB00C 5728 bytes
SHA-256: c3533b9fafb494bb93a2927573390756e00ec09a7e153113bcea46338bb3666a
font_01_sfnt_off0000c376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC376 9760 bytes
SHA-256: fc1ac85e8d917fd292f8c1244a150d78d5b9f91628e08e2594ab02a8a4c93dd0

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