Malicious PDF — malware analysis report

Static analysis result for SHA-256 c280b4164a28c360…

MALICIOUS

PDF

72.2 KB Created: 2021-02-13 19:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 988df99b3eb76cab7a2661123ef62d46 SHA-1: 3183337ce7d3b5e6edb3ebc71ca2458a155078c8 SHA-256: c280b4164a28c3606d70565cdef7849c3103d0d933a76af0e740a6ad03edaa04
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://maypoin.ru/wix?keyword=amc+10a+2013+21 PDF link annotation
    • https://boliminukedakos.weebly.com/uploads/1/3/4/4/134494229/vuvasuzagabup_duzobasoresop_dolesitabup_nipalanazava.pdfIn PDF document text
    • http://chambreop.xyz/wizadikatagerovarurup7tlgv.pdfIn PDF document text
    • http://blablablacar.online/hotspot_shield_for_windows_7qgepc.pdfIn PDF document text
    • https://kotazadan.weebly.com/uploads/1/3/4/3/134349323/2f21d8.pdfIn PDF document text
    • http://datingdate.site/ladue_reservoir_ohio_fishing_report58pal.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/template_decline_job_offer.pdfIn PDF document text
    • http://bestita.space/77294335870ujudx.pdfIn PDF document text
    • https://mipafalubered.weebly.com/uploads/1/3/4/0/134017716/mubuputure_topexelawi.pdfIn PDF document text
    • https://dofopukirisozut.weebly.com/uploads/1/3/1/4/131437491/733be18b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486193/normal_6026a312c5b75.pdfIn PDF document text
    • http://save50.pro/mapa_fisico_mundialz7d11.pdfIn PDF document text
    • https://kaposabebozof.weebly.com/uploads/1/3/4/4/134466843/9894908.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/poresi/heart_beating_fast_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/julekomululunesug.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/apple_airport_express_model_a1392_manual.pdfIn PDF document text
    • http://tufuripisaren.epizy.com/batman_arkham_origins_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/diagramming_arguments_exercises_with_answers.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_off0000dd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD22 5116 bytes
SHA-256: b547b759ed7293fdcbac0d54f2f816eb9957e507f4318ecbb1bb03c1bbcb426e
font_01_sfnt_off0000ee88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE88 10612 bytes
SHA-256: 63086daa895cddeef07612ba28a56e66c091a51aa2b24f862d6f28cc0d59615d

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