Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d396019b1f0a5f…

MALICIOUS

PDF

74.6 KB Created: 2021-03-23 12:24:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 531e1088ac56b79e4f128a8d77310c96 SHA-1: 50b0dc4124d60e3dceba0b25e6df1cc79783d62c SHA-256: 61d396019b1f0a5f0f0b31a0da402c6e27374ff99ff0f707adb26ac9e8e8e5ca
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=application+letter+for+job+employment+pdf PDF link annotation
    • http://ruwazumusef.scienceontheweb.net/zezugosukemafajanima.pdfIn PDF document text
    • https://cdn.sqhk.co/givujelised/egglYjd/53319218120.pdfIn PDF document text
    • https://dudefusuze.weebly.com/uploads/1/3/4/6/134628774/9192709.pdfIn PDF document text
    • https://cdn.sqhk.co/muruwake/1jhjggd/friends_chandler_bing_whip_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/xafigozenusu/jnGyuhl/choose_file_to_upload_android.pdfIn PDF document text
    • https://debinezituxi.weebly.com/uploads/1/3/4/3/134339783/f0e67bd0a.pdfIn PDF document text
    • http://xiwupulo.medianewsonline.com/signs_and_symptoms_of_depression.pdfIn PDF document text
    • http://faxusigeroles.sportsontheweb.net/nancy_drew_movie_online.pdfIn PDF document text
    • https://biwimukapol.weebly.com/uploads/1/3/1/3/131398517/kinaposux-mexanatidod-betinim-rojoza.pdfIn PDF document text
    • http://zarudofafibitov.mywebcommunity.org/grammar_exercises_with_answer_key.pdfIn PDF document text
    • https://ropojagininu.weebly.com/uploads/1/3/4/6/134635708/8027311.pdfIn PDF document text
    • https://sagabeju.weebly.com/uploads/1/3/4/6/134659190/zedufuvomeborer.pdfIn PDF document text
    • https://kewidanuratug.weebly.com/uploads/1/3/5/3/135323433/mapafade.pdfIn PDF document text
    • https://xanixozejalupu.weebly.com/uploads/1/3/4/8/134873627/6665014.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/text_message_app_for_ipad_to_android.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/71445126927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88dc76e2-5172-4395-8e16-b9378e377d17/wufolidumodurifibire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6cfc3bf-18fa-415f-861c-4ba3e170b480/xisemebej.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/allluia_le_seigneur_rgne_partition.pdfIn PDF document text
    • http://kibagog.onlinewebshop.net/statistical_analysis_in_excel_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/92706753138.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/maths_genie_cosine_rule_answers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A1 5428 bytes
SHA-256: 42c6a07c4b12cccf2ce91e4bf0c8dcfdd67a9b78db94486bbd2b15071516f4f2
font_01_sfnt_off0000fb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0F 9992 bytes
SHA-256: 6ceb7ee249a13d65f7656f696793da8b075c52b08312a9a6fbb7e3a699841191

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