Malicious PDF — malware analysis report

Static analysis result for SHA-256 a680e7cc493c5b36…

MALICIOUS

PDF

79.9 KB Created: 2021-03-04 19:05:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: da030ddceb695a907af80eb19374f119 SHA-1: 970bcd08c53142d7cb13f52319a72a488e7ed15c SHA-256: a680e7cc493c5b3621da10e8ea3e493d5391a9f178e03f22c960a77cb9a2b4cc
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=john+deere+js30+parts+diagram PDF link annotation
    • https://pakimisubimoge.weebly.com/uploads/1/3/0/7/130776027/nozapo-luwisakibagelan.pdfIn PDF document text
    • http://kumululurug.scienceontheweb.net/what_are_the_different_types_of_intimate_relationships.pdfIn PDF document text
    • https://vibofigejud.weebly.com/uploads/1/3/0/7/130740502/vexubexemu.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/how_to_configure_cisco_router_1841_step_by_step.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/2949711.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/cde403d1cd8ff.pdfIn PDF document text
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/sugabi_selidaf_folufemarafopej.pdfIn PDF document text
    • http://duwelizub.mywebcommunity.org/nancy_drew_season_1_episode_12.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/how_to_open_wall_safe_gta_5.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/a_random_walk_down_wall_street_summary.pdfIn PDF document text
    • http://zozamowewideno.mypressonline.com/4656175048.pdfIn PDF document text
    • http://peteferix.mypressonline.com/how_to_code_finite_element_analysis.pdfIn PDF document text
    • http://ketoxitigojaluk.sportsontheweb.net/kudemarakorakojusamabewa.pdfIn PDF document text
    • http://momarivido.mypressonline.com/96187712258.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_d02c691bd1414d9b97efdddbfbeef9b2.pdf?index=trueIn PDF document text
    • http://saxodanokijaj.atwebpages.com/body_reset_diet_grocery_list.pdfIn PDF document text
    • http://luxupovokajaf.onlinewebshop.net/58305740223.pdfIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_00a13d84011e45cc9761019976f0cdbc.pdf?index=trueIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/wj-iv_achievement_subtest_descriptions.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/zesadezosukuneg.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 5500 bytes
SHA-256: 752003c1c28feabd1c6cc634b709f209272cec3ca50ec037d99981de72765954
font_01_sfnt_off0000fe8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8A 11092 bytes
SHA-256: 87c74f66a11228fdcb827c0d5001b392164e4b1e0db44854db84e348dff5f70e
font_02_sfnt_off0001242e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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