Malicious PDF — malware analysis report

Static analysis result for SHA-256 6227e26c5ea65476…

MALICIOUS

PDF

78.6 KB Created: 2021-03-24 04:23:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: eccf1e844f0926dff8177fb9cdfc4a26 SHA-1: 13833059f2515e3f57e429578b380092b6a1bcb8 SHA-256: 6227e26c5ea65476870d3013dfd2143dfcb8159ea99c4f75132da696113da13f
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of numerous external links and the overall detection profile point towards a malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cdn-cms.f-static.net/uploads/4462075/normal_604fa6d4c2bbc.pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4418391/normal_5fee8e1b851e1.pdfIn PDF document text
    • http://gizigevom.mygamesonline.org/98203616089.pdfIn PDF document text
    • https://cdn.sqhk.co/kijowevo/jcIOjjY/captain_america_symbol_hd_wallpaper.pdfIn PDF document text
    • https://jebasiju.weebly.com/uploads/1/3/1/3/131381450/jipodusifinobujozo.pdfIn PDF document text
    • https://vobelorigod.weebly.com/uploads/1/3/4/0/134096073/7996216.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469374/normal_5ffd6d7de79d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446026/normal_604bb9504f855.pdfIn PDF document text
    • http://vasakuso.sportsontheweb.net/signos_y_sintomas_de_cancer_infantil.pdfIn PDF document text
    • https://tusezewepoxir.weebly.com/uploads/1/3/4/3/134339989/kelupuwunobanuj_pizebujarovod.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/evYgg80/zaremokomarari.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/YJBdAhb/nunupotuv.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/BkLpjgf/11848352295.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/85611534800.pdfIn PDF document text
    • https://cdn.sqhk.co/mimufedu/hhksgjv/animal_shelters_near_me_that_take_guinea_pigs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448985/normal_603cb33e0ee26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/wb/ENAH/~3/bVCGPfG74RQ/wb?keyword=baby%20girl%20names%202021%20listPDF link annotation
    • https://uploads.strikinglycdn.com/files/e7685ab8-daa2-462b-99b3-fec8b6b7faa0/video_games_appropriate_for_7_year_olds.pdfIn PDF document text
    • http://lixugafepujijoj.onlinewebshop.net/99804032633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b08b5d7-a3a8-4a04-bee7-4387bab11537/sims_3_patch_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ad71c6-cd41-45d2-b98d-8a68e24e8ed2/bob_evans_turkey_sausage_nutrition_facts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/996b283b-d52b-428b-97e8-640171a1a51c/nature_by_emerson_summary.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_off0000f3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 5620 bytes
SHA-256: 58eab689359beb97f83bb3ce41aa341351161cdff3e1200087dcec34427ed5ef
font_01_sfnt_off000106fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FE 11316 bytes
SHA-256: acb39052182bdc568c4eb62af9922424ff38a8cb9d298d3dcaca3750b369671b

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