Malicious PDF — malware analysis report

Static analysis result for SHA-256 5713afb371eaecd4…

MALICIOUS

PDF

76.8 KB Created: 2021-03-22 12:12:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6f69a903cc8ffd0901d7765e64160088 SHA-1: 28de65bb950cfb061dfef06181d0b3b5f3912821 SHA-256: 5713afb371eaecd448f451c48983cbd0e0269f7ba55eb76e68afe6a72f8a0c1a
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'fokemale.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to engineering demand, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=are+engineers+in+demand PDF link annotation
    • http://storedubai.shop/15217327740rkk7h.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/28286569576.pdfIn PDF document text
    • http://com-signto5.xyz/angular_use_variable_in_template1phmb.pdfIn PDF document text
    • http://madewithsunshine.com/teas_6_study_guide_online122oa.pdfIn PDF document text
    • http://wukazejuze.22web.org/stephen_king_if_it_bleeds_audiobook.pdfIn PDF document text
    • http://esplus.pro/islamic_song_99_names_of_allah_mp3_downloadmexkg.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/pharmacology_and_the_nursing_process_free4madf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xotaferuju.myartsonline.com/what_causes_water_blisters_around_mouth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4f2f7e5-054e-4c29-b4cf-4f7ad51da785/zajirajugowuxomebir.pdfIn PDF document text
    • http://duxurulokij.epizy.com/jivulanabuda.pdfIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_fc55fd1bff944dab80938ab1f569faed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cc13a92-38dd-4c93-8d43-17efe27e1ada/mesakodonoveguxase.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/cigarette_package_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/zoniluzivegezexedonexa.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/xorojiresenopamad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/388a294f-bd8c-4064-b0db-be3c76569201/9880404748.pdfIn PDF document text
    • http://kisolapuri.rf.gd/fugegopidarosuf.pdfIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_827b122ab7524d7d9ef68a7155325ce5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fokapikow/27124078840.pdfIn PDF document text
    • http://jivemewogipalen.rf.gd/43311437652.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/facebook_apps_for_android_mobile_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31dc0748-9841-48c2-b838-079add3fe9a6/manual_ka_matlab_kya_hota_hai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b12ecdd6-d099-40fa-8478-f6cf17470914/maintenance_engineering_handbook_8th_edition.pdfIn PDF document text
    • https://fecd0c08-032d-4b8b-b26c-6108aca7a00f.filesusr.com/ugd/a87c8b_f4aa2687eab34dadb3968a6b5a4c908a.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED07 5104 bytes
SHA-256: f8efc22e34b1882519491ea72abe170f55c58806cc0123017c722d564ce73fbb
font_01_sfnt_off0000fe4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4C 10892 bytes
SHA-256: a8aef16ee3c6d497dc45887785b357af65fb7b98104e52432972d56556eb2464

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