Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ed57c778468638…

MALICIOUS

PDF

76.7 KB Created: 2021-03-08 17:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ef8b62bf8acf4acb42ac59732ae87acd SHA-1: d887d71975ea61dd7f14fc0667897531b770ce0c SHA-256: e7ed57c77846863864e5fa8fc7633021c80b6cd89f02b1d05c45b0be95671872
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI that redirects to a suspicious URL, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'how to service heat pump water heater' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/strik?utm_term=how+to+service+heat+pump+water+heater PDF link annotation
    • http://polobasopika.mywebcommunity.org/40386511844.pdfIn PDF document text
    • http://center-about.com/jntuh_r13_percentage_calculator55npa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452862/normal_5fec6998169d7.pdfIn PDF document text
    • http://mavpa.fun/gedorunogikfx6z.pdfIn PDF document text
    • http://womenita.fun/the_outsider_albert_camus_freesid0o.pdfIn PDF document text
    • http://honbiz.pro/the_cherry_tree_by_ruskin_bondg7xct.pdfIn PDF document text
    • http://biniwitovo.mywebcommunity.org/crazy_stupid_love_country_song.pdfIn PDF document text
    • http://qwertyujg.xyz/what_causes_visual_and_auditory_hallucinationsgowzp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423189/normal_5ff66267a96ec.pdfIn PDF document text
    • http://detonic-buy.website/41536040671l296k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443337/normal_5fec880db8fb1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505820/normal_600193999836a.pdfIn PDF document text
    • http://voyazh-shina.com/vimeo_360_video_formatx4490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5fd68ed0799a4.pdfIn PDF document text
    • http://tokio-2020.fun/bonutikovod5gnge.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/fasudikek/memes_template_tamil.pdfIn PDF document text
    • http://danebusuji.onlinewebshop.net/74638275054.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/amatic_small_caps_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/adblock_free_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/riwarekazi.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/microsoft_gtsc_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/apple_iphone_6_ios.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/tebebuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/94895945666.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_off0000eeb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB5 5252 bytes
SHA-256: e1ae21b1fbdaf9ae7b62eeb18c562e8b55d05a87e699d80e9c4e82e8dfe1df2d
font_01_sfnt_off00010082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10082 10636 bytes
SHA-256: 4893bc962d5d7f24769f9727b4a26402eba203e0a66df65bde66432f270717c7

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