Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4afe162693cef0…

MALICIOUS

PDF

73.0 KB Created: 2021-02-14 19:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4db97b76e9b38f7439b2a049e79be04d SHA-1: 33b575e9a028484f818d7e7717d10f6f1df43545 SHA-256: 6b4afe162693cef025557742b14fccfbc8ae13143ede023c3ea2a7d861079e26
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=joy+mangano+steamer+discontinued PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411245/normal_600ff2279cdf2.pdfIn PDF document text
    • https://rolarijigajegij.weebly.com/uploads/1/3/1/4/131438579/buvukuxibawawiruta.pdfIn PDF document text
    • https://sojisesoto.weebly.com/uploads/1/3/1/4/131437607/zonabarat-boxukadov-zekip.pdfIn PDF document text
    • https://vipegiwofavagob.weebly.com/uploads/1/3/5/3/135302795/zejuwinut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_600beeedceab8.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/lovetijif/gradient_centrifugation.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/ginux.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/sureflap_microchip_cat_door_nz_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/nuwarigemasipu.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/xiaomi_mi_box_android_tv_4k_review.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/small_blood_stains_on_bed_sheets.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_off0000e058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE058 5320 bytes
SHA-256: 929ca9402ab359c54efeee92f38da8e62bf78b8e185771c229eca50b1f6204e7
font_01_sfnt_off0000f25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25B 10852 bytes
SHA-256: fc5bc10e136e21ae6a486ad1136af4e790036e60f964e50612dd34d3f8837ff0