Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4cdbd0ea52873c…

MALICIOUS

PDF

74.6 KB Created: 2021-02-25 20:06:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ef2fd2ca3d8e65112afea713aff3b280 SHA-1: 3be4413daa183977af62962dde27c208123b4259 SHA-256: bb4cdbd0ea52873ce516d622188c39212872fe94db1f7f36e5e5d83031d109ff
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://baarspo.ru/aws?utm_term=%25C2%25BFqu%25C3%25A9+se+puede+hacer+cuando+la+vejiga+est%25C3%25A1+ca%25C3%25ADda PDF link annotation
    • http://kamikofonem.mygamesonline.org/honda_mower_hrr2168vka_parts.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/89343330567.pdfIn PDF document text
    • https://duwawituku.weebly.com/uploads/1/3/4/3/134306950/jedogemof.pdfIn PDF document text
    • https://sivagodumojuji.weebly.com/uploads/1/3/4/2/134235915/592164c083c.pdfIn PDF document text
    • http://romeital.space/loluxowezattlj68.pdfIn PDF document text
    • https://lufufalab.weebly.com/uploads/1/3/4/6/134634403/85ed7097d9.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/dubiditiginowo/what_is_class_a_b_and_c_airspace.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/89660317823.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/22._how_many_chickens_would_it_take_to_kill_an_elephant.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/gavomitepoxomumap.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/show_battery_percentage_android_5._1.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/freemake_audio_converter_crack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/jegisexexufekuzufozipekar.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/72580180288.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/bajivamizolas.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_off0000dfee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEE 6068 bytes
SHA-256: 90d50f44644763dba9edf45c2b1612fc957822f16781dfedc14b77a883c79dde
font_01_sfnt_off0000f3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B6 12164 bytes
SHA-256: 4f96b21b045b847f2f9da69e4fed72fab6b9ed1def4ff2e44703cba6b0e698e3