Malicious PDF — malware analysis report

Static analysis result for SHA-256 3102690368210ee9…

MALICIOUS

PDF

103.3 KB Created: 2021-05-10 09:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1857fd77549cef07d5cd43d43b4367d6 SHA-1: b5dfe3eb52145c7ae68f6aae0e7ba6ccb1b0dc14 SHA-256: 3102690368210ee998206abb7177a6308d5abc64de9607c1adbd71520117557f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, suggesting it's used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, appears to be a lure disguised as a technical handbook.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/strik?utm_term=ashrae+1997+hvac+fundamentals+handbook.pdf
    • https://cdn.sqhk.co/damukowabij/ivN0gf4/23015443353.pdf
    • https://cdn.sqhk.co/xuxozowaki/58ibhjj/matujisebisumore.pdf
    • https://cdn.sqhk.co/menumuxod/bIigDgg/sba_online_business_plan_template.pdf
    • https://cdn.sqhk.co/nunemiziku/mWBGOjb/vabodezolenolezasowazore.pdf
    • https://cdn.sqhk.co/gegatuzikat/gUiagi1/oneplus_switch_stuck.pdf
    • https://cdn.sqhk.co/xomorenut/ghgficU/kasokiriramixukefukixa.pdf
    • https://cdn.sqhk.co/dalubevemex/giibjiH/romumikusifuvopumivo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/563eace6-ea49-4251-ac92-2c093b9521f4/macbook_pro_2020_user_guide.pdf
    • http://beduxuluwuniva.rf.gd/what_are_the_goals_and_purposes_of_social_sciences_research.pdf
    • https://s3.amazonaws.com/dutuzanob/how_do_i_change_the_light_bulb_in_a_panasonic_microwave_oven.pdf
    • https://uploads.strikinglycdn.com/files/a4ff1481-e3f9-4b36-a185-6dc7bfaa1714/how_to_connect_to_parrot_ck3100.pdf
    • https://uploads.strikinglycdn.com/files/e21d4bc6-674a-4c47-ae41-1ad7b768675e/33155232992.pdf
    • https://s3.amazonaws.com/duzexefemosaxe/hp_8300_sff_review.pdf
    • https://uploads.strikinglycdn.com/files/efb6efdf-df4c-4584-9476-47dda4061bb8/the_odd_couple_playbill.pdf
    • https://uploads.strikinglycdn.com/files/dec50e06-9c8f-47a8-9650-dc4918be7fdc/2500_dollars_in_1960_worth_now.pdf
    • https://uploads.strikinglycdn.com/files/e72e8139-e592-4783-a465-d250af6da126/how_low_do_your_carbs_need_to_be_for_ketosis.pdf
    • https://s3.amazonaws.com/zunaduxa/music_sheet_for_guitar_and_piano.pdf
    • https://uploads.strikinglycdn.com/files/3c5a6546-efe5-44de-a8d3-e8bd1d011199/runepasewejapiw.pdf
    • https://uploads.strikinglycdn.com/files/f6439e2c-6a7a-43bf-ad53-0b9c02fd24a5/chuwi_hi8_update_android_5.0.pdf
    • http://fafofifusa.rf.gd/iron_mike_pitching_machine_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/7ad8465f-1bf9-4c12-9b7e-62ab758c2d84/how_do_you_win_an_argument_over_text.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
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123ab.bin
342df213af66b7bd7a531683e6fe28fba3c925a7146d4c51435089e62600fcd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123AB 5968 bytes
font_01_sfnt_off0001379f.bin
14723db28eec1790cac73858477f19905954a99e2f3bf34e62c24ec113b30cd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1379F 6348 bytes
font_02_sfnt_off00014712.bin
83e8f79b802895ccea68879beaae519d8727a24eec61519a196b1d9e1ecc7815		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14712 14880 bytes
font_03_sfnt_off000177d4.bin
f758b8449ba85e113643a13ebeff43fbc4e9b059afae4e3c838108d49779cfdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x177D4 16628 bytes

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