Malicious PDF — malware analysis report

Static analysis result for SHA-256 049c6e4b138270a5…

MALICIOUS

PDF

103.4 KB Created: 2021-04-02 06:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbaf26f94f648a5929b8e578b2699464 SHA-1: 8292b527be995ef637cc0c49aedf31ded777f28e SHA-256: 049c6e4b138270a50b90eb53a442a038e5632760724d709eaefd3e5ebc331523
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 phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a malicious file. The document body, though heavily obfuscated, suggests a lure related to educational worksheets.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://golowaki.ru/wix?keyword=metric+measurement+lab+worksheet+answer+key
    • http://womovenum.sportsontheweb.net/daftar_asmaul_husna_dan_artinya.pdf
    • https://zugixipenelir.weebly.com/uploads/1/3/4/5/134591811/mutig_palilelulu.pdf
    • https://cdn-cms.f-static.net/uploads/4501233/normal_605467b55216e.pdf
    • http://gijaninapumobe.sportsontheweb.net/algebra_1_volume_1_answers.pdf
    • https://static.s123-cdn-static.com/uploads/4381081/normal_5fec6db41882f.pdf
    • http://vasizazesunof.medianewsonline.com/solving_equations_with_variables_on_both_sides_puzzle.pdf
    • https://xowemaxixedire.weebly.com/uploads/1/3/5/3/135325030/pikoliperovok-fenox-sidetugixina-rukilawo.pdf
    • https://kawotubizon.weebly.com/uploads/1/3/1/8/131871780/9214636.pdf
    • http://tularobumof.66ghz.com/rulimivuwamarul.pdf
    • https://cdn-cms.f-static.net/uploads/4497079/normal_6022aa456150d.pdf
    • http://fujigukatujewu.medianewsonline.com/behavior_intervention_plan_sample.pdf
    • http://zemegazi.22web.org/subacromial_impingement_syndrome.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kelukakeb/finding_the_main_idea_and_supporting_details_worksheets_with_answers.pdf
    • https://s3.amazonaws.com/kotodur/47329726629.pdf
    • http://tenurusimuxu.epizy.com/rupazujosadexuti.pdf
    • https://s3.amazonaws.com/wujanozo/acra_business_profile_form.pdf
    • http://lokikigufam.epizy.com/66937528270.pdf
    • https://s3.amazonaws.com/savukojubusum/pemorixe.pdf
    • http://pujumek.myartsonline.com/tores.pdf
    • https://s3.amazonaws.com/xaliwalufoguni/jobonifulisefezuz.pdf
    • https://s3.amazonaws.com/xukirizugukugi/estudio_de_casos_y_controles_2019.pdf
    • https://s3.amazonaws.com/towutoginadivu/encyclopedia_of_freemasonry_1917.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe6c.bin
9d28fd6b3eaa1eb00b0dbc71690af98b71836692b0fba1ada71daeea54edc32a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6C 4184 bytes
font_01_sfnt_off00010cdb.bin
34f0f8f4fb564ab04ad199b92fd710985464c6f414a8c96e0a5668956c9df4a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDB 5440 bytes
font_02_sfnt_off00011f4a.bin
49a0cfd8f9543ceb8a1a2483bf9a74d2c99f2deef08f4adc7b9c990645fd6c90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4A 9040 bytes
font_03_sfnt_off00013188.bin
1f7cf96143ada7a16ab8cc98e5d5ab4e155d5257987697a8410908841d86061c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13188 15952 bytes
font_04_sfnt_off00016638.bin
99441d38df4a21c473251b6b6baf563b232609a8f65519665f15cbda33668a4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16638 16680 bytes
font_05_sfnt_off00017d59.bin
1d203b844b714b76b1de9216af419df72a319fb84c68f46964a36b4a2c736433		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17D59 6128 bytes

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