Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2fdb2cba9d6e347…

MALICIOUS

PDF

84.6 KB Created: 2021-03-18 08:04:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cf546c86b10d4909cf38326f9f106eff SHA-1: 2094a6cc38ad6b880f27d588c560597d56ced3fb SHA-256: a2fdb2cba9d6e34760d6d46f0111201cd62d7165c4087fff20366c1bef6efd8e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one, 'https://xezojetit.ru/strik?utm_term=powerwise+charger+board+28126-go3', pointing to a suspicious domain likely used for phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to a 'Powerwise charger board'. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest it's used as a delivery mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/strik?utm_term=powerwise+charger+board+28126-go3 PDF link annotation
    • http://mipasotul.22web.org/zijaxexejumineru.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/61659272954.pdfIn PDF document text
    • http://xewuxufulizifu.22web.org/pnas_pending_final_recommendation.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/are_bmw_expensive_to_service.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/jiAHFLy/xigukopivepotirogixuz.pdfIn PDF document text
    • https://kererivodukeje.weebly.com/uploads/1/3/5/3/135303009/xutiw.pdfIn PDF document text
    • https://nuguzawopaji.weebly.com/uploads/1/3/4/0/134040365/cc1553d4e.pdfIn PDF document text
    • http://ginumon.iblogger.org/97096471029.pdfIn PDF document text
    • http://mivegik.mygamesonline.org/levantamento_planialtimetrico.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzexesetaba/iahchig/alexander_dawn_of_an_empire_similar_games.pdfIn PDF document text
    • https://zumikifekov.weebly.com/uploads/1/3/0/8/130813997/8345682.pdfIn PDF document text
    • https://webuxeneme.weebly.com/uploads/1/3/4/3/134368634/7569573.pdfIn PDF document text
    • https://wosutazewaxutu.weebly.com/uploads/1/3/0/7/130775331/lagaxomazezilisada.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
    • http://fawipiro.rf.gd/2814286433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92a44ed5-f18f-47f5-8cb8-062cab3089fb/easy_guitar_songs_for_beginners_chords_sheet_music.pdfIn PDF document text
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_098ea7b69add4078acc1d916491ef550.pdf?index=trueIn PDF document text
    • http://bebojivim.myartsonline.com/96055379050.pdfIn PDF document text
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_4b6455ded3ac463a8074cb1072b756eb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa3a08f-20dd-42c7-8ed1-8f17264d11bd/jadezulabodidetotozeba.pdfIn PDF document text
    • http://ketaxijos.rf.gd/what_child_is_this_christmas_song_lyrics_and_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce00f1ec-86a7-4fa8-8b5f-2731d6be0515/5360594781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9effd24a-1f9a-4cd9-8206-93320d322bc2/85135056600.pdfIn PDF document text
    • http://zirutabu.myartsonline.com/54564036154.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_off0000fcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD1 5732 bytes
SHA-256: 9d703be881719e4fcfa1f9b44584fc30970ae05d6a2cf8655a96830cce6f37c2
font_01_sfnt_off00011072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11072 11332 bytes
SHA-256: fdfb13679fc5f99b666a67caed0c681f8639b7ac2d0cd79a72860138ca3d68e9
font_02_sfnt_off000136fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136FE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333