Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fff1c0ab5df4439…

MALICIOUS

PDF

71.6 KB Created: 2021-04-21 12:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 05069ec73fe2a6cb594ab807cf35b12d SHA-1: 53cf84863f361270d38961270ab57056d9ccb1cb SHA-256: 6fff1c0ab5df4439c0be9f3832b76a2ac3d422b0926aa1a7e415e910a0b771f1
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 0.9997

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://soxebez.ru/strik?utm_term=stihl+011+av+spare+parts+list PDF link annotation
    • http://gebuhrenfrei-mein.com/monitor_cardaco_speedo_80621g0evnp6159x.pdfIn PDF document text
    • https://cdn.sqhk.co/divabasom/hbzD1h0/derwent_inktense_24_colors.pdfIn PDF document text
    • http://gatorama.fun/36143287040gkrcy.pdfIn PDF document text
    • http://mebelintera.ru/soguvarevodaruwotazou2kwb.pdfIn PDF document text
    • http://wigogaduxatinuv.iblogger.org/popowaxeki.pdfIn PDF document text
    • http://salestore.pro/can_i_put_a_regular_storm_door_on_a_mobile_home8brd6.pdfIn PDF document text
    • https://cdn.sqhk.co/dawezizupata/iO8aEhd/wukevogafuwesej.pdfIn PDF document text
    • http://steelsho1.club/pokemon_mega_fire_red_download_pcw4a83.pdfIn PDF document text
    • https://cdn.sqhk.co/dazulegug/pibidhi/earth_wind_and_fire_songs_do_you_remember.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/pijR7Nx/2d_shooter_games_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/falugojafat/fG12JmF/66270325187.pdfIn PDF document text
    • http://aov.one/97126869715xls50.pdfIn PDF document text
    • http://regse.website/343191200488hxj9.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzikewed/2ieoEH1/53756083528.pdfIn PDF document text
    • http://alisaborodaenko.design/tinijelevagisohtwbh.pdfIn PDF document text
    • http://armada.technology/50254963409z9faa.pdfIn PDF document text
    • http://gabigubegavuso.22web.org/nifijer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tokipobobanokab.rf.gd/fusenusegejikabawawomu.pdfIn PDF document text
    • http://baroputufusu.rf.gd/53271345745.pdfIn PDF document text
    • http://veziledijiv.rf.gd/34045122987.pdfIn PDF document text
    • http://wexewowi.rf.gd/natinetesejipam.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_off0000db26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB26 5264 bytes
SHA-256: af72b0030315300d2a2f17681af5496c7e76f294c16475a3abb8b1ac25b6ef42
font_01_sfnt_off0000ed0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0E 10712 bytes
SHA-256: 21a0322309a7c1d4115dbf9dba524c63881b421d47426c2cad97e0954b85a63b