Malicious PDF — malware analysis report

Static analysis result for SHA-256 a03afa428eff2ff6…

MALICIOUS

PDF

72.6 KB Created: 2021-02-19 20:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3323cacfd61e6779fff62ad541574878 SHA-1: d13b5e5ddb9acee8bd6a573d30bc69fc264e78d7 SHA-256: a03afa428eff2ff6150391b3cfce899b8272029a41375052ff00c4c8e0efa42a
294 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://crophysi.ru/wix?keyword=little+live+pets+user+manual In PDF document text
    • https://betisifi.weebly.com/uploads/1/3/1/4/131438474/zamojewik.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/jeFMjdm/wapewuwibaleb.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/jhJzRuk/gituvab.pdfIn PDF document text
    • http://xudiremomikuxe.iblogger.org/jajuvimafaj.pdfIn PDF document text
    • https://netiwolofud.weebly.com/uploads/1/3/1/4/131438008/delibiro.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/fedufiporara/nord_vpn_apk_crack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/in_tenderness_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/zivudu.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/abstract_the_art_of_design_mega.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/airguide_barometer_thermometer_hygrometer.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/angular_2_cli_cheat_sheet.pdfIn PDF document text
    • http://xepalufozakot.epizy.com/splashtop_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/kugovifatujajak.pdfIn PDF document text
    • http://ferurexage.epizy.com/tofesijes.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_off0000e1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F2 4964 bytes
SHA-256: c0e2f40ce308739973de33e562917e93e4063487a6a93fde740747c4ddc84f82
font_01_sfnt_off0000f2c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C1 10332 bytes
SHA-256: caa18ab3f7d03629ddad18ad508dc48b653919578e98663a30a0e1fb3b6b0c28