Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0877f0cf5e8114d…

MALICIOUS

PDF

75.5 KB Created: 2021-04-27 01:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4c41fbc41ae62d3b207eea46d99a7a62 SHA-1: b80146a2202ea580172585eda12546e30fc2b58f SHA-256: a0877f0cf5e8114d78b96f3fae0a4534addb540951ac0b1b9da3df1a734e1874
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/strik?utm_term=all+souls+trilogy+collection+deborah+harkness PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421354/normal_60137ad52abc0.pdfIn PDF document text
    • http://gepopusoka.mypressonline.com/cal_spa_filter.pdfIn PDF document text
    • http://rumigiwataj.getenjoyment.net/236903681.pdfIn PDF document text
    • http://pavozuketogo.mygamesonline.org/mezirajejeluvuzupekijuwib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_602946bf3cf0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386834/normal_6023a24234866.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/ay_mis_ancestros_anne_ancelin_schtzenberger_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388048/normal_6032b53a0d54d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_60436a89ab004.pdfIn PDF document text
    • http://rupaduwovuw.getenjoyment.net/98324654834.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/kopisigapub/ba_admission_form_uos_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6168558-c8ea-4a81-8e5c-e506066db4df/miniature_dachshund_puppies_for_adoption_in_texas.pdfIn PDF document text
    • http://womawujun.atwebpages.com/difference_between_hero_4_silver_and_black.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78742db5-ec7b-481e-9d1a-e0b55943cfb9/amsco_apush_short_answer_key_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/bul_bul_kannada_film_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/pewetamadug.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/what_is_a_project_cutover_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/soxenukuliruselojofexeso.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/sukes.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/ryanair_app_for_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/borders_for_ms_word_2007_free.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_off0000e9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DF 5496 bytes
SHA-256: 1d56bb9f945fd7c26db4f1331608c96e62b1742b70fa0f8db885b5157e152eda
font_01_sfnt_off0000fc8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8E 10560 bytes
SHA-256: 9d1c97a28338d443a877bc6d9c6733bf0a2fa0efa08d2578843ba5399f14d52d

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