Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e3c72567edf567…

MALICIOUS

PDF

90.0 KB Created: 2021-03-07 02:47:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 78d9bc9a538b2bdb84d6b51e473c1544 SHA-1: 9386a4000646549deeb2e4cc7b77da16fa2ad107 SHA-256: c2e3c72567edf5676126e8cce7eaa04e42e65296ca4b224033e8da22b394f96f
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 0.9992

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
  • 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://baarspo.ru/strik?utm_term=which+way+do+convergent+boundaries+move PDF link annotation
    • https://nuropasidax.weebly.com/uploads/1/3/5/3/135393275/3443029.pdfIn PDF document text
    • https://vogavova.weebly.com/uploads/1/3/1/6/131606390/6204003.pdfIn PDF document text
    • http://susitit.iblogger.org/dorian_gray_chapter_1.pdfIn PDF document text
    • https://fofomakizu.weebly.com/uploads/1/3/0/7/130775640/c071386998.pdfIn PDF document text
    • https://zuvagojajom.weebly.com/uploads/1/3/5/3/135398962/korevujosetewulevule.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/petubapizo/open_office_writer_avery_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/hmrc_self_certification.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/16183167588.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/calculus_2_solution_manual.pdfIn PDF document text
    • http://gadodapav.rf.gd/mevefisusokot.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/exerpeutic_gold_heavy_duty_foldable_exercise_bike_with_400_lbs_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0ca3982-58ff-4476-b219-9a06122700a0/vutazepawegumaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/conveyor_roller_guide_rails.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8944347e-c81a-4ef5-99d3-b0a854eec317/51881683431.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/beyond_the_sea_robbie_williams.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/jimedup.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/sewuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b3e28e-3f23-43b2-8ac5-c763c5c91b6f/how_to_reset_nanostation_m2.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/cut_song_video_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/hard_order_of_operations_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/osrs_inferno_text_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/78046876784.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/bible_study_questions_and_answers_for_isaiah.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_off0001219b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219B 5728 bytes
SHA-256: eae93dcb49c14316ce67d3191edaf9617fbda0c3a54b04d356588345e3a4ad65
font_01_sfnt_off00013519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13519 10912 bytes
SHA-256: 78a05c9a645edf826a28a1730cc7b61654ec71be6f32403299e3f6258917d833

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