Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8019511e93cf2c…

MALICIOUS

PDF

104.4 KB Created: 2021-03-21 06:12:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb28fa37a082fb35535fa4e8aa897b92 SHA-1: 735b24dfb6361d9af6c4481b77e7831c027e7f82 SHA-256: ed8019511e93cf2c2bfb920ffdbf9e79223e5a38f09d947136ad1a8052fe3832
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary focus on 'seumenha.ru', suggesting a lure to a malicious website. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a disguised attempt to present a drone manual, further supporting the lure tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wix?keyword=dji+mavic+2+pro+manual+russian
    • https://cdn-cms.f-static.net/uploads/4470017/normal_600ecd4bebeda.pdf
    • http://segwaywheelchair.ru/perfect_master_3d4p8le.pdf
    • https://meletiwupidime.weebly.com/uploads/1/3/5/3/135313264/kovejizoxak-dezulunaju-deraje.pdf
    • https://cdn-cms.f-static.net/uploads/4481278/normal_6021a530d9bf4.pdf
    • https://mamunazeve.weebly.com/uploads/1/3/0/8/130814121/3012106.pdf
    • http://viniveba.mywebcommunity.org/fodorulu.pdf
    • http://tazizinujumijoj.mywebcommunity.org/flysky_i6_quadcopter_setup.pdf
    • https://cdn-cms.f-static.net/uploads/4384310/normal_6030a2bc40b58.pdf
    • https://cdn-cms.f-static.net/uploads/4374957/normal_603e8ae0e72bb.pdf
    • http://nashremont.site/telling_time_grade_2_worksheettje4i.pdf
    • http://train-home.ru/26662556858kvsoe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fefurorobumi/bedingte_formatierung_excel_2010_farbe_ndern.pdf
    • https://s3.amazonaws.com/jefazaxal/32723073085.pdf
    • http://jisunopesaluzi.atwebpages.com/cuestiones_de_sociologia_pierre_bourdieu_gratis.pdf
    • https://uploads.strikinglycdn.com/files/de4bf55d-b711-4284-a8cd-92fe37df96af/9913357192.pdf
    • https://uploads.strikinglycdn.com/files/94cfc1e8-3fea-4c1e-9b8e-31be3eded830/davis_vantage_pro2_iss_manual.pdf
    • https://s3.amazonaws.com/vavebufevodutob/77109172906.pdf
    • https://uploads.strikinglycdn.com/files/507ce85e-62cf-414c-ac4e-7a0e973a2cde/que_taller_artesanal.pdf
    • https://uploads.strikinglycdn.com/files/56f9c417-2062-44ae-9b74-b796a407c1b5/best_indian_non_veg_diet_for_weight_loss.pdf
    • http://vefodipox.myartsonline.com/what_is_cartesian_coordinate_system.pdf
    • https://s3.amazonaws.com/baxegezivumi/doniluju.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011552.bin
2aba9cd6214f0e7af1f20c8d6f19b048ebaf3a25cc225b86c70e974ef14cdf1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11552 3220 bytes
font_01_sfnt_off000120d1.bin
df387c94c045b8472a0766db5a4eb7552aa5e6ceee88a7756dc38ec2f9c5d205		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120D1 5028 bytes
font_02_sfnt_off0001318a.bin
83a486a56c5e4d14ed8761275b64361fba19a86f21d5406f4638b9f37aa00e44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1318A 6252 bytes
font_03_sfnt_off000140b9.bin
d6af309a5ba0c8ddc6088e5e9f8ed0d30591efd1e3130eb32a8368db9001da2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140B9 14512 bytes
font_04_sfnt_off00016f82.bin
b1b93bf558ee65cf174bdde98fc70b39c77ddcfeef9d3a00758a58eb2f24951c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16F82 16260 bytes
font_05_sfnt_off000184f7.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x184F7 4324 bytes

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