Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7f171f4cae6f6f…

MALICIOUS

PDF

78.1 KB Created: 2021-03-08 10:59:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: be37a56d0e741fdddd95e5a53f7a5e22 SHA-1: 1f280b20c3f1048fd6a4ebcbd6fd8403681cecd4 SHA-256: 7b7f171f4cae6f6f0a5c7642e07303ba962d96093885f285c92b781b619c500d
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://nipisod.ru/123?utm_term=ados+2+manual+for+sale PDF link annotation
    • https://cdn.sqhk.co/boxepupovemu/czVySji/kibakavulawejotozusadugag.pdfIn PDF document text
    • https://legobunisazej.weebly.com/uploads/1/3/4/5/134501617/xeroduxibumafire.pdfIn PDF document text
    • https://gitarufimoka.weebly.com/uploads/1/3/4/2/134235546/22df7ef741360.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/wizurum.pdfIn PDF document text
    • http://gopusoduj.mygamesonline.org/siwivibewubutelok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424991/normal_601fb0eba6cb8.pdfIn PDF document text
    • https://dinoromakutaxe.weebly.com/uploads/1/3/4/4/134479472/posiwupi.pdfIn PDF document text
    • http://mumijivamivaxij.medianewsonline.com/manual_sigma_1609_sts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478950/normal_5ffde5a8d7168.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/what_are_metric_measurement_units.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443326/normal_600d8c1d94c86.pdfIn PDF document text
    • https://cdn.sqhk.co/jevikepuja/midlQCn/37273769933.pdfIn PDF document text
    • https://moredotaze.weebly.com/uploads/1/3/0/7/130776260/0c96cf8c6331.pdfIn PDF document text
    • https://cdn.sqhk.co/suxevevagova/CjihjUB/71006433887.pdfIn PDF document text
    • http://zuzatew.medianewsonline.com/more_than_words_tab_songsterr.pdfIn PDF document text
    • https://bulipegorevuju.weebly.com/uploads/1/3/4/7/134700868/zeloralewadigox-gudodaboze-sejizerevas-kodiduw.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/biwubeleba/chopin_nocturne_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/pewemexinon.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/jingle_bells_for_trombone_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/40488479578.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/jerusalem_on_high_hymn_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/9168622740.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/gcse_biology_magnification_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/bananatag_for_gmail.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/88025106607.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_off0000f6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A0 5176 bytes
SHA-256: 136caf370d5c705a851c5a2132aab9fe3e942afbb00f670078be790fbbf75035
font_01_sfnt_off00010821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10821 10132 bytes
SHA-256: 26903af5dd038587b7efd7ba1538cb8a21abcfac06e5e30f2ae6e33298b75d0d

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