Malicious PDF — malware analysis report

Static analysis result for SHA-256 a797766a7d1b67a9…

MALICIOUS

PDF

78.1 KB Created: 2021-05-24 14:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5957df2fba015534fd9a808959767c42 SHA-1: 773d18d4594466feee914169ef7db6461a32f78f SHA-256: a797766a7d1b67a98b398f6d9346f6c61bf5f6d228b4b0dcf45f5fd618a8aa89
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The PDF structure and embedded content suggest an attempt to disguise malicious activity as a search result or informational document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=does+walmart+sell+cricket+cell+phones
    • https://static.s123-cdn-static.com/uploads/4376101/normal_6004eb8403817.pdf
    • https://cdn-cms.f-static.net/uploads/4451356/normal_603a794b56f5e.pdf
    • https://fataleripe.weebly.com/uploads/1/3/0/9/130969718/piwutowawizitizi.pdf
    • https://temabodanifow.weebly.com/uploads/1/3/1/4/131454916/xisameruto-gokewotupasalaj-kiwozizagod-majefidakema.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/6597fe0e-0dcf-455b-b335-d49ec06d2ce1/vibijunenogevuwaloji.pdf
    • https://uploads.strikinglycdn.com/files/acb2c541-6880-418f-a530-32cc5a2644d9/free_rc_airplane_plans_download.pdf
    • https://uploads.strikinglycdn.com/files/034ec4c3-96a4-484a-be95-3165cf37ef05/dirt_devil_model_103_bags.pdf
    • https://uploads.strikinglycdn.com/files/67577303-98d8-45dc-b346-af80c89fb173/xelaxoratuw.pdf
    • https://uploads.strikinglycdn.com/files/c13a1ab0-5bc2-4695-b7c4-7600fc75a550/fifty_shades_darker_movie_free_download_dual_audio.pdf
    • https://uploads.strikinglycdn.com/files/e6671eb6-3f9f-4e00-88f5-5c9c2f63c6ef/what_reading_level_is_the_sea_of_monsters.pdf
    • https://uploads.strikinglycdn.com/files/2158d3ec-52d9-4c65-b001-cb847348d57e/war_of_the_worlds_2005_full_movie_download.pdf
    • https://uploads.strikinglycdn.com/files/146b0562-d8b1-4a03-9b02-b71ea8caa0e8/what_is_the_order_of_the_dresden_files_books.pdf
    • https://uploads.strikinglycdn.com/files/eb186e16-2e37-48eb-8c5a-0586a928f50a/asrock_z170_pro4s_nvme.pdf
    • https://uploads.strikinglycdn.com/files/ade0ed7a-f511-44fe-9163-836ee3c1b9c8/hp_probook_6570b_audio_driver_download.pdf
    • https://uploads.strikinglycdn.com/files/80e0122d-4d6a-4560-aaa1-8b488aaa5781/maze_runner_4_full_movie_download_in_hindi_480p_filmyzilla.pdf
    • https://uploads.strikinglycdn.com/files/3a3159eb-2922-4160-841d-11942a27513a/levujexer.pdf
    • https://uploads.strikinglycdn.com/files/a73d052c-61ac-466c-b7cc-a1d46eba6ebd/kogonegoxizapuledabo.pdf
    • https://uploads.strikinglycdn.com/files/001927f2-41b5-48b2-9a34-c117a6ca30b7/gajitez.pdf
    • https://uploads.strikinglycdn.com/files/8a050110-4776-4808-8b50-54149d0c12b2/lg_50uh5500_review.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e491.bin
f8238fef4a501fe9332dbdea0870cad2110360af7099f9a3a994785601c28c81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE491 5116 bytes
font_01_sfnt_off0000f5d6.bin
34e14d35ecee4ad1fc744a202ca1f46b62868c5ef4651beb9dfa8ec03b917396		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D6 10860 bytes
font_02_sfnt_off00011ac9.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC9 4324 bytes

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