Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7e8d7395f8ec49…

MALICIOUS

PDF

69.4 KB Created: 2021-01-30 14:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1585e7e1f2af47c2c06abb0ff3261443 SHA-1: 1d4d5ab3d2fb4c57eb7368946f8e8b846ed0d787 SHA-256: 3d7e8d7395f8ec4954fcee5a20adf84848c154c5a22d3526126b99c456fd4297
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wb?keyword=free%20blank%20calendar%20templates%202020 PDF link annotation
    • http://fotonagosuslugi-01.space/suzijulusejoeerys.pdfIn PDF document text
    • http://golomashvanna.xyz/hip_hop_drum_pads_experience_apk6kho7.pdfIn PDF document text
    • https://biziremidawa.weebly.com/uploads/1/3/5/3/135397591/820af.pdfIn PDF document text
    • https://demaxezobenila.weebly.com/uploads/1/3/1/8/131856353/6253193.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/Pjfheie/38874172713.pdfIn PDF document text
    • https://zosumomaxin.weebly.com/uploads/1/3/4/0/134040430/9080488.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/xekatek.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/f4z2giO/zuxasudosarusazaxopo.pdfIn PDF document text
    • https://dupigonaw.weebly.com/uploads/1/3/5/2/135297060/nijuduvadosenex.pdfIn PDF document text
    • https://xofiguguja.weebly.com/uploads/1/3/2/7/132710561/8857436.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/12599a843bd229b.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/nilititonawafim/mifufomifor.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/fobizigimuz.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/bubble_tea_shop_business_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/81279219298.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_off0000d291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD291 5652 bytes
SHA-256: 31baa2da8e1626a67515182e78c1542390fd7df113601c39b6a4b1360fcde61e
font_01_sfnt_off0000e5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AF 10324 bytes
SHA-256: 3e3ce6e22f6ee029fa78459490e3e207e8dfddbd7ced739822bab1b46720844e