Malicious PDF — malware analysis report

Static analysis result for SHA-256 58d951a7a070045e…

MALICIOUS

PDF

70.7 KB Created: 2021-03-01 22:25:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9e817ec7dbadddf45f9bd8dff9f5b003 SHA-1: b565838792460e1a17d578f1286088379a3be0b7 SHA-256: 58d951a7a070045efd956d6aabb9e0970206d3111d045aa3a5599b1f51041e9d
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nipisod.ru/wix?keyword=living+environment+regents+august+2016+answers PDF link annotation
    • https://roxowuvunesoneb.weebly.com/uploads/1/3/4/8/134889799/6801189.pdfIn PDF document text
    • https://kimukotepasa.weebly.com/uploads/1/3/5/3/135329918/9ff33c7039.pdfIn PDF document text
    • https://wiludexubusut.weebly.com/uploads/1/3/2/7/132740186/7773911.pdfIn PDF document text
    • http://gafujovinotu.22web.org/51359658960.pdfIn PDF document text
    • https://xewezepi.weebly.com/uploads/1/3/0/8/130813550/123be8796f.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/bKKsjfw/loki_heroes_of_mythology_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/jadizefon/dicDvij/nick_carter_young_interview.pdfIn PDF document text
    • https://faromemexe.weebly.com/uploads/1/3/5/3/135399009/wamuwuluwinidaj.pdfIn PDF document text
    • https://wodanosivowifig.weebly.com/uploads/1/3/4/5/134593279/9564984.pdfIn PDF document text
    • https://gawosiluzetur.weebly.com/uploads/1/3/4/6/134631715/zefenizefevu.pdfIn PDF document text
    • https://fofapisobav.weebly.com/uploads/1/3/4/7/134712410/bd7c716af.pdfIn PDF document text
    • https://cdn.sqhk.co/domonuxasi/cibu9KJ/47744203470.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/gizonukorad/blanchard_macroeconomia_gratis.pdfIn PDF document text
    • http://mafukifuwu.epizy.com/forcepoint_ngfw_appliance_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/saudi_aramco_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/127335965.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/apology_email_to_boss_for_poor_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/bavadumijitoduxix.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/javogepajubaz.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_off0000d5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FD 5544 bytes
SHA-256: cbb2f9d6762778d3ae408fa1b3cc5aefa179fbd07f90134bbc64d9a4589dc4f4
font_01_sfnt_off0000e8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DE 10588 bytes
SHA-256: 2c3d5a13ac5e017b7ba4aa357de344059bd4e345713133f0f34737084001a0b8