Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b884d1dec8e44ba…

MALICIOUS

PDF

79.8 KB Created: 2021-02-20 03:07:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 593eca10919a2fa8d5b20d7f3ff9d153 SHA-1: bfec7a95125d27f4f4ce3f663b1af93454533e1e SHA-256: 2b884d1dec8e44ba9a06bac3102dc21549553e25bc5907b445d5882e984b208a
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://jottigo.ru/wix?keyword=incredible+human+machine+worksheet PDF link annotation
    • https://bekodezu.weebly.com/uploads/1/3/1/8/131856725/45b07cf79e44945.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/ghihaja/nike_lunar_racer_5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_60118cf82a5f8.pdfIn PDF document text
    • https://petominezejoza.weebly.com/uploads/1/3/2/3/132303337/88a1a1e5f.pdfIn PDF document text
    • https://cdn.sqhk.co/fixijolexap/jdt4Ygc/69874641279.pdfIn PDF document text
    • https://warenumew.weebly.com/uploads/1/3/4/8/134871813/5015129.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/inegiPQ/36446371495.pdfIn PDF document text
    • https://cdn.sqhk.co/xogudililavo/ieaigjR/slice_dice_rice_switch.pdfIn PDF document text
    • https://dotofufodil.weebly.com/uploads/1/3/5/3/135313806/3283335.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/pasutiz/pajejofaferobonevip.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/modern_chemistry_textbook_answers_chapter_1.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/73735777648.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/android_start_file_picker_intent.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/53009223307.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/20035402935.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/78360266893.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/past_simple_regular_verbs_games.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/tegixopinuniju.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_off0000fb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB02 5412 bytes
SHA-256: d0848a0441e9d744afe2d8beda444455020b8cadbfabb4a42918b2d49a01e6ce
font_01_sfnt_off00010d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D47 10856 bytes
SHA-256: fc91d24e3dac4bffba8e98b2b0085139d56f586137e6f196fb262c31e10580dd

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