Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4853e5903f69d24…

MALICIOUS

PDF

79.7 KB Created: 2021-05-23 19:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f907fb049f726e848c739e7bc0831fcc SHA-1: 1bb536e59e6d27e2e6e81d4b436c6c5851c6e44d SHA-256: f4853e5903f69d249d7b35f30d431ad4882d822f0479747699b2d147dfb546ff
104 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 presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/strik?utm_term=how+to+convert+amazon+kindle+ebook+to+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476142/normal_602aff91d84c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_60135b1441603.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392664/normal_5fcce664558a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476427/normal_5fc5bc1919f21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447487/normal_5ff2ae2bf367c.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/dejazuvorira/32756622541.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/android_10_wallpapers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12878c31-828b-45e9-839b-bd09677050c0/adding_and_subtracting_fractions_lesson_plans_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/afloat_shopping_guide_section_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c18256-a35d-4db8-85b6-d125a9ebe50d/what_is_1000_of_100.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/bayern_mnchen_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/26754696714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ca7a57d-d6f0-43e9-b946-c6b26cd632a0/safety_disney_true_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa5cf61a-c3e9-4778-b205-40a77254ecab/32468499484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77d22793-44b8-4a09-9dc4-2badb5e873b6/reddit_cmv_cats_are_better_than_dogs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f956910-9680-43e9-a177-879dad779fde/gofalizelazorozo.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/how_to_use_table_tools_in_word.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/top_30_question_and_answers_at_interviews.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/xasolovexudufa.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/waxifogenoxav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bbe71a2-1630-4c17-98dc-10b0c0a9a4aa/gebadasiteti.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/chunkzz_2017_malayalam_hd_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/92767964195.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/washington_state_travel_restrictions_november_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e84a061-54c7-4721-a132-94245d25ef9d/29028199796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcae09e0-41a9-4353-94d6-80ca5aa679d7/data_warehousing_concepts_slowly_changing_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cd90c80-ec05-4887-ab58-d84ed03ca93f/21182080434.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_off0000f73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73A 5488 bytes
SHA-256: 9e52f744acb6cb0374f2bd8c20e645aeb1b544ca49a9de027864f97e885b3d6d
font_01_sfnt_off000109ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EA 10936 bytes
SHA-256: dbf31044f2fb600546d49641eebfc984827365e4ed8301a658cede3ce6d1d1d4

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