Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd8b25221b69f183…

MALICIOUS

PDF

76.3 KB Created: 2021-03-20 06:46:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f1fd54a5a64e65b2123d7c425ce2571a SHA-1: 7f62c61842229920cc84c5f9b441c73659b3e8fd SHA-256: cd8b25221b69f1833f4bd4c40c4117243232459b8f78cf268fe88e1b7f213c5e
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one prominent URL suggesting a phishing or scam attempt related to air conditioning repair. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of social engineering lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/strik?utm_term=why+is+my+ac+not+cooling+properly PDF link annotation
    • http://tuwobezike.22web.org/user_interface_specification_document_template.pdfIn PDF document text
    • http://wavapivanuf.scienceontheweb.net/82206202114.pdfIn PDF document text
    • http://repair-kompov.ru/can_you_learn_arabic_in_a_yearfx7hh.pdfIn PDF document text
    • http://moneyindia.site/16436897387zehq4.pdfIn PDF document text
    • http://hookup668.site/tracfone_moto_ehlz6f.pdfIn PDF document text
    • http://wipababotuzuke.iblogger.org/dadasoxirubutudit.pdfIn PDF document text
    • http://zuxuvikewi.sportsontheweb.net/capacitive_pressure_sensor.pdfIn PDF document text
    • http://profer-opt.ru/yuntum_marathi_movie_songs1pjgz.pdfIn PDF document text
    • http://ubzvp.com/tobugexsfz6k.pdfIn PDF document text
    • http://viwoxavufonodu.22web.org/onn_cd_player_with_fm_radio_reviews.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/mogedozara/benitos_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c288ad1a-fe30-4570-bca6-fed1387f3a31/dot_net_with_c_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ae34e63-ce23-4a3d-b1d9-55bfb0e42c26/defending_jacob_review.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/20585646158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ae96be5-d06f-4491-be9c-e26ac996af6b/70809376132.pdfIn PDF document text
    • http://rubipupajet.rf.gd/rogotuzuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c9ee3f-4efb-47ca-83e2-22356606d66c/boy_scouts_lawsuit_2021.pdfIn PDF document text
    • http://pivimufe.atwebpages.com/17191704516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a53202f3-adc4-4279-8acf-efed6db7e20f/69675908109.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/29662172878.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/best_english_book_store_in_hong_kong.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/615fbcc5-b8c6-4f71-929d-0aba507ea1e5/sodemadoweka.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/vsco_apk_mod.pdfIn PDF document text
    • http://supijidexigoba.epizy.com/amba_shambhavi_devotional_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72b42749-5fe5-4d99-8a3a-06d905dc0f2a/24515374141.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_off0000ec87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC87 5464 bytes
SHA-256: 285697990450cff0e5285f33532211bc73f3d76d76794155702c1b79c9b85b9e
font_01_sfnt_off0000ff06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF06 10620 bytes
SHA-256: 9ec4cdebd864da218339e00933b32eb1d4976414e937fa73310e78b98713ab4f

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