Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e705ef0625ebc0…

MALICIOUS

PDF

65.4 KB Created: 2021-02-02 23:57:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 184f21de2d121d93a3420e4539d4d92f SHA-1: acfef419421e1f3e138499ad085db3c02871eb2c SHA-256: 73e705ef0625ebc01de0d099be565591fb038db02baf3cee50071eb7dc594888
254 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
  • 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.
  • 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://yafferge.ru/shook?utm_term=prank+call+voices+funny In PDF document text
    • http://jilet2.club/4860567814uhohn.pdfIn PDF document text
    • https://lexezidelaxo.weebly.com/uploads/1/3/4/6/134605078/c3747a82451fd.pdfIn PDF document text
    • http://puzigodemabotod.iblogger.org/consolidation_report_in_microstrategy.pdfIn PDF document text
    • https://cdn.sqhk.co/safubuguva/ggjcLhT/blacksmith_courses_near_me.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/8942366.pdfIn PDF document text
    • http://gelumagiz.iblogger.org/bowoxapokogigisovid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bidusopevix.epizy.com/the_water_fountain_song.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/jezun.pdfIn PDF document text
    • http://vedaremix.epizy.com/algebraic_expressions_class_7_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/buxeriwuwuzif.pdfIn PDF document text
    • http://pububebojivoru.epizy.com/antivirus_smadav_terbaru_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/clendening_lake_fishing_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/tutagof.pdfIn PDF document text
    • http://pizibajavodup.epizy.com/31983105179.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/accidents_reported_today_in_ga.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_off0000c3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F6 5100 bytes
SHA-256: 133cedeb7b80e1a90b5a5e3219336d5cc501da356bc91796a7cc804bfc5bccf7
font_01_sfnt_off0000d573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD573 10396 bytes
SHA-256: 1e96ae396d12366bafb8563152ea7488eb2745d1a4607f7a79620506e6e71051