Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b0aee1702db21dd…

MALICIOUS

PDF

80.0 KB Created: 2021-04-01 11:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df8995562097df01ee231462fa285bab SHA-1: 7e03bebfb775c8040ac5c8ee31fdbbea2b351729 SHA-256: 8b0aee1702db21dd00cfcd6cdf47e4a3de192b5d7d86c456378c1acbd2cda556
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF link farm. One of the primary external URIs, 'https://mezovuduw.ru/award?keyword=causal+analysis+essay+pdf', is directly associated with the document's apparent lure. ClamAV detection and an ML classifier further indicate malicious intent, specifically flagging it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and extensive link farm suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/award?keyword=causal+analysis+essay+pdf
    • https://nozusetemakofam.weebly.com/uploads/1/3/1/4/131408546/sodotabumi.pdf
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/c3da46baaeab73f.pdf
    • https://cdn.sqhk.co/litawoxelida/cUqijzF/formula_accidente_de_trabajo.pdf
    • http://xaxefewina.22web.org/how_do_i_reset_my_bose_remote_control.pdf
    • https://giderolimarova.weebly.com/uploads/1/3/4/0/134098849/defulo.pdf
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/gijijawagi-dowomajux-diribo.pdf
    • http://pexiwaz.iblogger.org/comforter_sets_with_silk_sheets.pdf
    • https://cdn.sqhk.co/gupetipek/Ghc3K9f/19946717641.pdf
    • http://rulogojaratimad.22web.org/cofactors_and_coenzymes.pdf
    • https://cdn.sqhk.co/jezaziritav/Yjbgjii/dimerewegosemadepimeba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7f52e2e8-a968-4a8d-adf0-dd8f6e17ea71/2011_hot_springs_prodigy_cover.pdf
    • http://genuziga.epizy.com/togigugazuzopusixijul.pdf
    • https://uploads.strikinglycdn.com/files/4f6c9768-ca6d-4ac8-83f1-f25138faf165/how_do_you_cook_ribs_in_a_pressure_cooker.pdf
    • https://uploads.strikinglycdn.com/files/5c3a60c5-2b52-4bac-ac92-4f4b949c786c/best_3d_animation_software_free_download_for_windows_10.pdf
    • http://boraxatisota.rf.gd/13391355984.pdf
    • https://uploads.strikinglycdn.com/files/93120ebb-1c3e-4c27-8a3e-a9040f64e7b3/how_to_convert_an_image_to_grayscale_in_gimp.pdf
    • https://uploads.strikinglycdn.com/files/a2bee11e-9d3e-407d-9612-6f039541bc77/rules_of_blocking_in_magic_the_gathering.pdf
    • http://nuratijuwatag.rf.gd/7554341024.pdf
    • https://uploads.strikinglycdn.com/files/12f18d33-80ba-4a19-9fdd-1d117ac76ca7/25914962.pdf
    • http://zenejifawulo.epizy.com/74600448252.pdf
    • https://uploads.strikinglycdn.com/files/76035ee5-d63d-4716-9dd2-e8a2c16ddd89/what_is_proximal_zone_of_development.pdf
    • https://uploads.strikinglycdn.com/files/ff92c0ba-efd6-4c44-a9a7-ecf8cf507ce4/pigopevikezitilupapataw.pdf
    • https://uploads.strikinglycdn.com/files/cf1e1249-9fc4-4f27-9bcf-a1d4238ccc36/tepudal.pdf
    • https://uploads.strikinglycdn.com/files/af4c4c0d-d094-4932-bf63-8d08cb030706/la_crosse_technology_wattz_wireless_charging_projection_alarm_clock_manual.pdf
    • http://kunitugi.rf.gd/why_is_orpheus_and_eurydice_important.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_off0000fb4f.bin
59ff116cf3bd436abf242d8981fa574ce11771c073358e0fe4c46a672568526e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4F 4948 bytes
font_01_sfnt_off00010c40.bin
3616e9361413978eab27eb9f7dfc7d80fd17ad1d472e560e68afeeb0d3fc5ede		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C40 11000 bytes

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