Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3feadfd4693ec5b…

MALICIOUS

PDF

77.5 KB Created: 2021-02-16 02:00:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c9328e8b65483a433d3310e8e5857a22 SHA-1: 05cad747ea5fdf2232612c36a76991c26ed22d64 SHA-256: e3feadfd4693ec5b7fe9d259c0b9e5955db1978ab84809107ff3fe6c27336296
164 Risk Score

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 a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/123?utm_term=how+to+teach+english+in+spain PDF link annotation
    • http://tojasojula.iblogger.org/whatsapp_plus_apk_latest_version_6._60.pdfIn PDF document text
    • https://liwitozawaben.weebly.com/uploads/1/3/4/0/134042828/jerazinebolisek.pdfIn PDF document text
    • https://piziwola.weebly.com/uploads/1/3/1/3/131382430/vijodigu.pdfIn PDF document text
    • https://vitekasawo.weebly.com/uploads/1/3/4/4/134456264/pajevuvi_sigibe_lanunuvew.pdfIn PDF document text
    • https://tufanemoxidubux.weebly.com/uploads/1/3/4/3/134315727/dd0da1c8.pdfIn PDF document text
    • https://lesesagipamagaz.weebly.com/uploads/1/3/0/7/130739561/94cc9c47fd.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/a1388965f198.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/rurovikejigibu/whatsapp_status_sad_songs_video.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/9618651933.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/58975387652.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/utorrent_movies_telugu_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/bobby_womack_harry_hippie.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/89387425468.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/adobe_spark_post_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/punudunisexanotixu.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/57660675826.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_off0000f25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25C 5152 bytes
SHA-256: 8d879e4d8f2ea841b95a84834d64575d2c80f1ec192440f350c27bdb75b9fdb1
font_01_sfnt_off000103fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FA 10760 bytes
SHA-256: 1148a4b406e0a7c3e17fe0ae5b011ccce3ed3dcbf7ebbb118afe4795702c15d2

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