Malicious PDF — malware analysis report

Static analysis result for SHA-256 66a8016c06ea9424…

MALICIOUS

PDF

70.8 KB Created: 2021-02-20 10:48:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 317af58b903f9c087fedc18a8e708a4b SHA-1: 7ad59aac7b4527efbaf8405e26595b84aa0a5275 SHA-256: 66a8016c06ea942417dcec18dafc8a6b4fb8763aadb2c2773eb159bbd9f0f9c5
212 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
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=vizio+e48-c2+stand In PDF document text
    • https://pakurematumomu.weebly.com/uploads/1/3/4/7/134764434/sokas_zivogat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369504/normal_5fd08864bab0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463262/normal_6030a859101cc.pdfIn PDF document text
    • http://exclusmxpn.com/how_to_make_a_snake_knot_paracord_lanyard9u6kh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_6017aa209f01d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_6024761438f14.pdfIn PDF document text
    • http://kuziluzesoga.22web.org/7835144595.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374196/normal_5ff269a0adee0.pdfIn PDF document text
    • http://about-central.com/white_platform_bed_canada6iadz.pdfIn PDF document text
    • http://medicinfo.online/roman_numerals_1-_100_charta9bpn.pdfIn PDF document text
    • https://bovejivisesuja.weebly.com/uploads/1/3/1/3/131384116/wosepixenonexud.pdfIn PDF document text
    • http://berkeciftci.net/tiradm2r05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424935/normal_5fc647a1b7ec3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456712/normal_5fccdfa5c417c.pdfIn PDF document text
    • http://dreabling.online/astm_e83hhypd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://jupejorix.epizy.com/dyspepsia_guideline.pdfIn PDF document text
    • http://wajodojizofe.epizy.com/call_of_duty_androidgamegratisan.pdfIn PDF document text
    • http://boxemoje.epizy.com/unbreakable_full_movie_dual_audio_480p.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC68B 5264 bytes
SHA-256: dd0ff2c21f94431f5a291cecbf32b1b74a99f70505ea1cd80405b0c25d8e33dd
font_01_sfnt_off0000d893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD893 6148 bytes
SHA-256: 488ffee5e9c33bcc1f3f00aec749f35977d0cdd209ffadaee35194d66ecc177d
font_02_sfnt_off0000e873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE873 11028 bytes
SHA-256: aa43f98ffd349cc017dd784aa37b375775a6a349f9a1ae7fc67c9d66831c43e5