PDF malware analysis — malicious · 013ec1247fc66f60

MALICIOUS

PDF

68.9 KB Created: 2021-03-28 23:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c018cf59a8f210ea826c342abe521e57 SHA-1: 9a1e00c58c60552b28a279bf23cee17cb048ad87 SHA-256: 013ec1247fc66f607d8d9c2e699b97f805265a7438a0d8aa344db42a7ef4d80f

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to 'lesson 4 homework practice descriptive statistics answers'. No scripts were extracted, but the presence of an external URI is a strong indicator of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

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://zajinet.ru/wix?keyword=lesson+4+homework+practice+descriptive+statistics+answers
- http://fanilobepewe.sportsontheweb.net/analogias_numericas_resueltas.pdf
- http://gitipakivo.iblogger.org/graphic_design_portfolio_sample.pdf
- http://good-production20.site/rugatjvcxu.pdf
- http://xevojifixifepi.scienceontheweb.net/12621710025.pdf
- http://dom-bita.org/17092361379ymm2z.pdf
- http://pokemonrivals.online/byju_s_the_learning_app_online1yuc1.pdf
- http://civiliscmq.online/are_fruit_gushers_gluten_free80v41.pdf
- http://getfreecreditreport.info/adventure_island_game_nes35klr.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/33ef5fc2-3b76-4160-b2be-6e06d46f2ee1/zirusifobi.pdf
- https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_b1381553886046e48e4790621441d56f.pdf?index=true
- https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_5a659f3b95844a398d5c426d3845e7c4.pdf?index=true
- https://57eba762-b826-4879-8d7a-7f480aba2934.filesusr.com/ugd/e89c2b_1688d60c6dc1437f8eaecde451db0b15.pdf?index=true
- http://gemunedipu.rf.gd/threaded_binary_tree_in_data_structure.pdf
- https://s3.amazonaws.com/vobuturinivi/msi_970_gaming_motherboard_cpu_compatibility.pdf
- https://uploads.strikinglycdn.com/files/c50b0df2-f7a5-4c56-8141-aa7259e66768/lenovo_g50-45_battery_replacement.pdf
- https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_55ef09609afa4ebbb22ed9bbe7ad97bf.pdf?index=true
- https://s3.amazonaws.com/jadudusujuje/sivonowirudaxowesof.pdf
- https://uploads.strikinglycdn.com/files/6fff77be-427b-4736-9118-4f33df40b029/mapa_conceptual_sobre_niveles_de_lectura.pdf
- https://uploads.strikinglycdn.com/files/c9cc1dbb-4fb5-4923-a1bf-dc8189742ba0/nordictrack_audiostrider_990_pro_price.pdf
- https://uploads.strikinglycdn.com/files/f9f800ef-c656-4e71-a658-1ec91805d376/3002853629.pdf
- https://s3.amazonaws.com/jefazaxal/36398967978.pdf
- https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_a76546d783074d53be9290173b7bc436.pdf?index=true
- http://gexijefepawu.epizy.com/23493197439.pdf
- http://lutubipejor.rf.gd/6450103444.pdf
- http://fedokow.rf.gd/dumimijorukeboze.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d0f6.bin` `15a936a05df9346711e26e8594530a4203e9ae9c028883f64e5cd68a9cc6a6b6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD0F6	5528 bytes
`font_01_sfnt_off0000e3b0.bin` `3fda118db2f84f169d102c55cf80e095bd9a6d98a060e3962688ebe59637573d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3B0	9432 bytes

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