Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf837bff7724c255…

MALICIOUS

PDF

73.4 KB Created: 2021-02-26 06:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 03c1362b6935caa469fce4cd79d7e261 SHA-1: dbbc205158052291e3d08a4fa7b9331abb4272c9 SHA-256: bf837bff7724c2555465e31d716739433a9bbd363907bccee3d6b648ccc3db27
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://bologen.ru/wix?keyword=denton+flea+market PDF link annotation
    • https://cdn.sqhk.co/tejurorado/fghajij/malogibakujumoxaw.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/2bMtsif/27826428744.pdfIn PDF document text
    • https://luvisusarav.weebly.com/uploads/1/3/6/0/136011852/budubatukabamebilo.pdfIn PDF document text
    • http://pagebake.com/daraterubemak3c.pdfIn PDF document text
    • https://cdn.sqhk.co/xataruzepape/fo7hehh/jozojirilakogufugejom.pdfIn PDF document text
    • http://experiment.website/pdf_ausfllen_und_unterschreiben7mr6f.pdfIn PDF document text
    • https://gizaluta.weebly.com/uploads/1/3/5/3/135345368/zinilogugiwat.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/eIhjMF3/light_me_up_lyrics_zayn.pdfIn PDF document text
    • https://zavisedifigi.weebly.com/uploads/1/3/4/3/134316550/mavivujukex.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/lakiwuruwemosep.pdfIn PDF document text
    • http://polfact.site/how_to_turn_off_door_ajar_alarm_on_frigidaire_freezer1gvlv.pdfIn PDF document text
    • http://helplnstagram-confirm.com/bless_the_lord_piano_chordsaqb1q.pdfIn PDF document text
    • https://kaxitojuwomig.weebly.com/uploads/1/3/5/3/135302818/zinenare-fuzumi-livilazes-xuduxemojajemed.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/fifuto/gesundform_calcium_d3_k2_tabletten.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/rafonizepopirewemujil.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_off0000e340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE340 4800 bytes
SHA-256: f9a27e2a6357cc27933bcaa830e054a801a43f2f2d4ccd5d479f6f7bc888e92b
font_01_sfnt_off0000f383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF383 11112 bytes
SHA-256: f35aa22fc5dc63c257a86ba2cef6d2ef820fa3362f2ed3abc9ab6c8c6c8d13ca