Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da1cf6bf62a5cae…

MALICIOUS

PDF

125.9 KB Created: 2021-03-23 00:20:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 09a5ed3de5737751f65456c3e4179294 SHA-1: 1f1dd0f6031218dea414f8da1b983c494425236a SHA-256: 8da1cf6bf62a5cae60ba16a62b2852d3a8c76b8114971cb8076af08a39c3973a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9990

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://kuzutuzo.ru/strik?utm_term=honeywell+barcode+scanner+manual+1450g PDF link annotation
    • https://cdn.sqhk.co/xidizizo/PggEL9x/converting_decimals_to_fractions_to_percents_worksheet.pdfIn PDF document text
    • http://tefetugadul.22web.org/what_is_spatial_arrangement_in_agroforestry.pdfIn PDF document text
    • http://bigchance.pw/dewukavsyjgl.pdfIn PDF document text
    • http://keksik24.ru/chrome_browser_apk_for_android_tv12s7v.pdfIn PDF document text
    • http://unreguezff.rest/bullguard_antivirus_with_crack1e3mc.pdfIn PDF document text
    • http://fruit-ital.space/gemonoxasaduzigatirapezuvduoj.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/hgcoDjj/assistir_masha_eo_urso_o_filme_completo_dublado.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/L8fuRgg/rock_music_definition_short.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/5jeicqG/64_filmfare_awards_2019.pdfIn PDF document text
    • http://lidlid.xyz/94581434044im778.pdfIn PDF document text
    • http://xemokajoled.medianewsonline.com/30845207151.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wumurunapaxilar.rf.gd/bebapeberezixuraki.pdfIn PDF document text
    • https://1fae3a98-13b7-4b95-b1f0-1fbd1b7b0aee.filesusr.com/ugd/1da05d_eea5391a106a4eb692336fc9736bfffb.pdf?index=trueIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_166c2f6ffd1745e69376c3f4edc5ece6.pdf?index=trueIn PDF document text
    • https://8717ace1-8174-44a1-9f98-e7cbf9e9ed94.filesusr.com/ugd/14e3be_9a52aa54058b479cbc8d2952932f82ae.pdf?index=trueIn PDF document text
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_966299dbc11f48f7a309af30d78a9a65.pdf?index=trueIn PDF document text
    • http://kawerulim.onlinewebshop.net/convert_arabic_file_to_english.pdfIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_9cfc8781e32f4b378be23574b4924db5.pdf?index=trueIn PDF document text
    • http://puzasapexuwuju.epizy.com/solving_linear_equations_worksheet_9th_grade.pdfIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_4174ee68cf944b6082b0a170a5b0d776.pdf?index=trueIn PDF document text
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_d954373d71974b7e92b419f6f81c41d9.pdf?index=trueIn PDF document text
    • http://lobulowigewimu.epizy.com/valor_timbre_cedula_catastral_informada.pdfIn PDF document text
    • http://zorijefugixor.atwebpages.com/weliropes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19964 5716 bytes
SHA-256: b8f79757c0288e18915304bdf5e0cfe998e4bec3a543214673e0792e74b0384d
font_01_sfnt_off0001acd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACD1 13216 bytes
SHA-256: 4b149c7a24c70b547f2e9a3e9c0ee85d2ad0d9bc1257eff8180f2cf250e4ac00
font_02_sfnt_off0001d957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D957 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230