Malicious PDF — malware analysis report

Static analysis result for SHA-256 266fea3d01c90a57…

MALICIOUS

PDF

81.5 KB Created: 2021-04-09 20:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ad92d674eb4678c591c619c9c3ac7e2 SHA-1: ddce9e3c4c47c591e8f82c023a33c0b9b9aef6e6 SHA-256: 266fea3d01c90a574873b5574156a5fcc84746fae067dfc2654f3dd9d907cab7
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to health or lifestyle information to entice clicks on the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 4

  • 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://crophysi.ru/strik?utm_term=how+many+calories+should+i+eat+16+year+old+boy
    • http://burrrhey.tech/flight_of_the_bumblebee_beginner_piano_sheet_musicx81qy.pdf
    • http://powerhdniy.space/64892906083s24ut.pdf
    • http://italy50wow.pro/rancilio_silvia_review_2020ja2bm.pdf
    • http://lnstagram-verifedbadge.com/behringer_xenyx_502_mixer_reviewm8976.pdf
    • http://susarivusu.22web.org/las_batallas_en_el_desierto_descripcion_de_personajes.pdf
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5b31bbc2-246c-4b99-8778-fb3fef733970/how_to_set_capello_tune_clock.pdf
    • https://s3.amazonaws.com/rabewiruzitewa/the_juliette_society_excerpt.pdf
    • https://s3.amazonaws.com/jigezilor/35072918100.pdf
    • https://s3.amazonaws.com/ligole/69535307247.pdf
    • http://bumevibil.epizy.com/68684743313.pdf
    • https://s3.amazonaws.com/tobaziw/rawoxupakojufo.pdf
    • https://s3.amazonaws.com/dogazisuze/pororupuweru.pdf
    • https://uploads.strikinglycdn.com/files/52830133-0949-4bf4-b45a-ebb8b19489f7/wemewijopawu.pdf
    • https://uploads.strikinglycdn.com/files/df45615e-300f-4805-8a73-408a25414371/phet_lab_states_of_matter_worksheet_answers.pdf
    • http://kiwusegofavuto.rf.gd/nivovus.pdf
    • https://s3.amazonaws.com/devuxuzejozam/catholic_answers_magazine_digital.pdf
    • https://uploads.strikinglycdn.com/files/7a168608-92bb-4421-af66-ebb55322485c/graco_magnum_x5_airless_paint_sprayer_for_sale.pdf
    • http://bufareloxejigu.rf.gd/business_in_a_box_2019_free.pdf
    • https://uploads.strikinglycdn.com/files/2d7ba083-a0bc-4eea-abf9-8f7a326a8c2d/swingline_heavy_duty_stapler_39002.pdf
    • https://s3.amazonaws.com/tobovunoberiki/finding_area_of_composite_figures_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/545fae9e-9aef-410c-9ad9-c193e919809e/71159884445.pdf
    • https://uploads.strikinglycdn.com/files/ed336c49-cf8e-42b7-a83b-0d6283abd61a/34284648961.pdf
    • https://uploads.strikinglycdn.com/files/cb52b343-2af5-47f6-adc5-db1a64bc02d6/35155681768.pdf
    • https://s3.amazonaws.com/kovezux/archery_king_zoom_mod_apk.pdf
    • https://uploads.strikinglycdn.com/files/6b5df09d-c018-4d27-8de4-89d74d427453/free_sharepoint_tutorial_for_beginners.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe2a.bin
07d561e917f0c3f76c49caa727abe74133a63f4e9b0968b2fca31acebe078078		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2A 5680 bytes
font_01_sfnt_off00011162.bin
a43f3b720b6dc3cd16f6211573fa01c20d222485984f266e40840a0cda036c53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11162 11264 bytes

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