Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4a27804788497c…

MALICIOUS

PDF

86.3 KB Created: 2021-02-23 07:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2423b3f43df6810ab215b5f92ee58be0 SHA-1: 9d8384ed05a43ccbda7d7ad817198c6fb1faa4e1 SHA-256: 1c4a27804788497c245e03ab6b575c3a04f01c6e148801ce0a81fbd12c125a3e
156 Risk Score

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 0.9996

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 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://jacksth.ru/strik?utm_term=easy+uke+songs+pdf PDF link annotation
    • https://zekenegelu.weebly.com/uploads/1/3/4/3/134390475/7344576.pdfIn PDF document text
    • http://busivel.xyz/597942906531490s.pdfIn PDF document text
    • http://zikapipumimapo.22web.org/dwg_trueview_2019_free_64_bit.pdfIn PDF document text
    • http://ch-redirect.icu/how_to_fix_xbox_360_controller_without_battery_pack9r4tx.pdfIn PDF document text
    • http://obmenkalnr.online/sparknotes_a_midsummer_nights_dream_act_1_scene_2sbi8t.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/london_metal_exchange_prices_base_metalss992u.pdfIn PDF document text
    • https://lirukasuk.weebly.com/uploads/1/3/0/7/130739032/jenutinisi.pdfIn PDF document text
    • https://wugoxuvalego.weebly.com/uploads/1/3/4/0/134017666/2595784.pdfIn PDF document text
    • http://papotupeti.iblogger.org/6912334448.pdfIn PDF document text
    • https://ponawexem.weebly.com/uploads/1/3/2/7/132740185/magan.pdfIn PDF document text
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/muvas.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/puretulenuza/53526500652.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/android_phones_cheaper_than_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/49769424763.pdfIn PDF document text
    • http://kojokiguxan.epizy.com/cookie_editor_firefox_android.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/how_long_should_i_cook_chili_in_a_slow_cooker.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/full_form_of_c._f._r.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/sowiw.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/78536393695.pdfIn PDF document text
    • http://vepesupilet.epizy.com/adobe_reader_app_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/regulatory_reporting_software_providers.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001150d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150D 5204 bytes
SHA-256: 16a4fc56a3ab6afaa503471b5d174d4c5aaa65dc229de2f402773c44779015a2
font_01_sfnt_off000126ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EF 10848 bytes
SHA-256: 7bb9654cbaf90e11a2e29eff9898c40c456c15942f8b6f48391725d68ed2d892

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