Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b90d8d6cc6d944…

MALICIOUS

PDF

65.6 KB Created: 2021-02-18 22:03:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b12f3660bfc5428a39dae3b0f7ac78eb SHA-1: c37f1b936c89a86c60a6236a4cf44cadc6291df2 SHA-256: 44b90d8d6cc6d944b89db446a0e8325f072890b1524d303a44a40051e17a25c8
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wb?keyword=beats%20by%20dr%20dre%20headphones%20wired PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372960/normal_602bdcd245bde.pdfIn PDF document text
    • http://gufutaca6.xyz/12723039558egfqc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492900/normal_60045d40795af.pdfIn PDF document text
    • http://befigter.xyz/candelabro_italiano_filme_completo_dublado9e8kc.pdfIn PDF document text
    • https://raxorevowipafe.weebly.com/uploads/1/3/4/7/134765671/8893035.pdfIn PDF document text
    • https://pagajunudew.weebly.com/uploads/1/3/5/9/135992687/pirusotuzu_jopuvami.pdfIn PDF document text
    • https://jodowofimen.weebly.com/uploads/1/3/5/3/135330599/d4a42a7242a14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450151/normal_5fe34ea29ff71.pdfIn PDF document text
    • http://save50it.info/pejamovimaeb1e6.pdfIn PDF document text
    • http://omoikiri.info/basicity_of_pyridine0rn57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369919/normal_5ff1b56d05cb6.pdfIn PDF document text
    • https://pelefazefipaguj.weebly.com/uploads/1/3/4/8/134892892/5271273.pdfIn PDF document text
    • http://milky-rp.space/probability_and_statistics_for_data_science_matloffrghc5.pdfIn PDF document text
    • https://pobunusegem.weebly.com/uploads/1/3/4/4/134460984/fonidamaxiwuxijo.pdfIn PDF document text
    • http://blognews.top/huawei_p20_lite_aggiornamento_android_qr93ai.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC14D 5396 bytes
SHA-256: 06b8327084ea3ff29c9d56e008a860f4ed479cd94addcb2b7dbfcb50d7115a60
font_01_sfnt_off0000d3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AE 11200 bytes
SHA-256: 1b587adac4f1375f5317bb5f73df515204e9129e28a0262af5235a35cc588979