Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47018361c79b507…

MALICIOUS

PDF

75.9 KB Created: 2021-01-25 17:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 64fa59785e3ff8abe9d83220d2d5254f SHA-1: 2968b545cd2a1fc8e53e280f96976118c3f997a7 SHA-256: e47018361c79b507250c08d7fd100fe1c35bb0ede2b9e0d508d04f38304570cf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are disguised as download prompts or lead to other PDFs, indicative of a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content.

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.
  • 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://jottigo.ru/wb?keyword=eliteone%20800%20g5%20drivers PDF link annotation
    • https://cdn.sqhk.co/mirofifuba/oMzjitH/frozen_chicken_go_bad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476756/normal_5fe2e9cfa4949.pdfIn PDF document text
    • https://widosutolitidaf.weebly.com/uploads/1/3/4/8/134847614/1421558.pdfIn PDF document text
    • https://joxegozul.weebly.com/uploads/1/3/1/0/131070165/dotepovopuxupogofuf.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/ieooIcI/40151824054.pdfIn PDF document text
    • http://italywom.space/479807763465lf1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393183/normal_5ff8ee922a99d.pdfIn PDF document text
    • https://cdn.sqhk.co/fivukidado/icmggib/green_party_2020_platform.pdfIn PDF document text
    • http://rocketdocs.us/the_fatal_raid_2019_english_subtitlesey54a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501654/normal_5ff965edd0fdd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377380/normal_5fc9442e43c4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451955/normal_5fefbb2be70f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5fdaf379ca3ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366961/normal_5fe2c3cce0157.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/jeworurowam/mortified_guide_podcast.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/yesterday_the_beatles_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/trusting_god_jerry_bridges_free.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_off0000ea50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA50 5260 bytes
SHA-256: 185266469e5141108336ad5d9d2306cc2f4663850e5e82bffad70d31e92fe58a
font_01_sfnt_off0000fc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC50 12020 bytes
SHA-256: ad4474668499dbb056bea479988eb7053fa548bf0daa571c240cfaab29f208a8

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