Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82c1e4f9b080a3f…

MALICIOUS

PDF

73.0 KB Created: 2021-02-21 03:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dd5b5400768a3bdb30a8784fd328c2f8 SHA-1: 5abdb75647dc25684d07e4b82dff47964c27e3ad SHA-256: c82c1e4f9b080a3fb6717d657dfe94fb0a5941cd52af06ceba3bca9f18ee5361
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 0.9997

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 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://seumenha.ru/wix?keyword=der+eisendrache+electric+bow+guide PDF link annotation
    • https://jedijevabepepox.weebly.com/uploads/1/3/0/7/130739982/pebizidewusiw.pdfIn PDF document text
    • https://tilapenudulaw.weebly.com/uploads/1/3/1/6/131607943/9870265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424632/normal_602b6748a29f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_60319bdab52c8.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/21e13a52085dc94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447089/normal_5fd1008263aab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453326/normal_602a8e94c3dc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494877/normal_60196a7aebe1b.pdfIn PDF document text
    • https://wiwazojuxosupud.weebly.com/uploads/1/3/1/3/131379189/4624307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_5fdbe589a8f63.pdfIn PDF document text
    • https://jizojalagakamu.weebly.com/uploads/1/3/4/8/134886497/zevejosurawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481834/normal_600a96cf58abd.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/batoragubukepo/identifying_controls_and_variables_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/52620072444.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/lamentations_of_the_flame_princess.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/21221988239.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/87379147044.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/send_to_kindle_cloud_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/ender_s_game_character_graphic_organizer_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/56416611881.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_off0000e237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE237 5432 bytes
SHA-256: ebbe28a1c448d4f0d924d7bb360eee46f4c811807435fbe8dd80709cb58528c1
font_01_sfnt_off0000f4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C1 9928 bytes
SHA-256: d4c52fca7b3a4a73456bb2f26f9fe650e2a8cbdf78dbd80696347dc6138a8037

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