Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af070236cd2bb58…

MALICIOUS

PDF

104.8 KB Created: 2021-03-03 11:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a7c64a31be48e5a0d4f42ab4234e82b0 SHA-1: efffb5c14cafbe34944fceef7daf57323de76870 SHA-256: 0af070236cd2bb5852a136106acc11f845d1a9c5931ce612ef2f2ea82a047614
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://crophysi.ru/strik?utm_term=what%2527s+wrong+with+guns+germs+and+steel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448536/normal_6023674ec4c92.pdfIn PDF document text
    • https://dusomekekonipa.weebly.com/uploads/1/3/4/5/134580960/vozureworisubi-risewodak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374360/normal_5ff64d73bfd99.pdfIn PDF document text
    • https://dadurafiwazozu.weebly.com/uploads/1/3/4/7/134768329/1461948.pdfIn PDF document text
    • http://vobefoli.iblogger.org/how_to_reset_ge_monogram_fridge.pdfIn PDF document text
    • http://dipazekonowa.mypressonline.com/warcraft_chronicles_of_war.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498868/normal_5fe99a688d401.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gedexim/indian_capital_market.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/22582778681.pdfIn PDF document text
    • http://dukutogesedu.epizy.com/simple_project_timeline_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/jupeminapopumiduz.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/chilkat_delphi_xe._dll.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/ap_language_rhetorical_analysis_essay_tips.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/journal_of_thermal_analysis_and_calorimetry_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/eragon_2_movie_download_in_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/51542043718.pdfIn PDF document text
    • http://gizogebinide.rf.gd/87179033590.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/how_to_set_garage_door_keypad_liftmaster.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/fiber_optic_sensors_book.pdfIn PDF document text
    • http://moxixezegosa.onlinewebshop.net/what_is_ideal_cycle_efficiency.pdfIn PDF document text
    • http://vedixemalirugi.atwebpages.com/99259615322.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F82 5260 bytes
SHA-256: 33ab45a571fb3b59dc7b2e24c4fbb8528dbc47f4e01be7debb656580a7c14393
font_01_sfnt_off0001614e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1614E 11216 bytes
SHA-256: fc81180e41cca641aea40b51854d3ff20da26778a5edaf371c0c2b2548c35ede
font_02_sfnt_off00018766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18766 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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