Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c197017e736605…

MALICIOUS

PDF

68.5 KB Created: 2021-03-05 19:50:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bf2e0fe2afe709800de4c3dd3abfce14 SHA-1: f27252cf6c549faefd885de23973af3c197f2b2a SHA-256: f8c197017e736605916cf5a78aee87a3de6f5dd20dcbfdc1201af09e2ba09882
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and includes a URL that points to a link farm on disposable hosting. The presence of numerous embedded URLs, including one on 'fokemale.ru', strongly suggests an attempt to redirect users to malicious sites for phishing or malware delivery.

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://fokemale.ru/123?utm_term=you+are+not+everyone%2527s+cup+of+tea+meaning PDF link annotation
    • http://getcabinets.xyz/gasukorobujikarurc1fdv.pdfIn PDF document text
    • http://bolozofer.22web.org/47186549682.pdfIn PDF document text
    • http://in-arenas.com/sonukenuvakejagem9q9me.pdfIn PDF document text
    • http://ek-arenda.ru/busepakeginy1yk6.pdfIn PDF document text
    • http://sparzha.club/literatura_del_renacimiento_espaol_autores_y_obrasi6iw0.pdfIn PDF document text
    • http://loberas.22web.org/21767996083.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://moberasar.rf.gd/kifukabazoruxelupap.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/lagu_change_up_seventeen.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/japanese_verb_conjugation_worksheet.pdfIn PDF document text
    • http://zagebixomibolo.rf.gd/59137678846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aab3e02a-4977-4693-b950-c79c1a118680/kadowego.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_a4df3bd39b5745ecafdc3681ce536ad5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8a08118-9538-4978-a2bf-adbe009db070/genie_pro_screw_drive_cm8600ic_a_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa2ec420-1063-495f-98a6-e53c4a1d3175/most_famous_jean_valjean.pdfIn PDF document text
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_94fd277d8de741df85325dba86be30ba.pdf?index=trueIn PDF document text
    • http://rajiwewovipu.epizy.com/17996492201.pdfIn PDF document text
    • http://fusugesagovovez.rf.gd/72221518379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3965b9fc-bd01-4f45-b59c-dad86ff852a9/marketbeat_best_penny_stocks.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/belajar_vba_excel.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46E 5460 bytes
SHA-256: e5758b50964faf00c8c23463442d0a0dfa82efca3b654677c01d80bed027303d
font_01_sfnt_off0000d707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD707 3720 bytes
SHA-256: a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9
font_02_sfnt_off0000e266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE266 9696 bytes
SHA-256: 7f95172c9db27d4f374505d223ff45a2e776a957683358d95264fb2094b69f1c

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