Malicious PDF — malware analysis report

Static analysis result for SHA-256 99885d999a51fd44…

MALICIOUS

PDF

76.1 KB Created: 2021-01-10 18:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 56ec865d2e01d18193f20916148a670d SHA-1: 4de7ee4bc120b8f8f2fec9b3d0805ce8bb07dca1 SHA-256: 99885d999a51fd446f6aee9f04d5f81e6fab0f666bd9f8e3f9358568ad60771c
252 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.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=children%2527+s+tylenol+dosing+sheet In PDF document text
    • https://jumejavirufefe.weebly.com/uploads/1/3/4/7/134765112/7907165.pdfIn PDF document text
    • https://site-1171549.mozfiles.com/files/1171549/jbl_stereo_speaker_system.pdfIn PDF document text
    • https://site-1177442.mozfiles.com/files/1177442/lemon_bundt_cake_recipe_using_yellow_cake_mix.pdfIn PDF document text
    • https://site-1181110.mozfiles.com/files/1181110/bingo_battleford_mississauga.pdfIn PDF document text
    • https://site-1168429.mozfiles.com/files/1168429/5766776722.pdfIn PDF document text
    • https://kupelaranix.weebly.com/uploads/1/3/4/7/134729830/sewigexa_rimakulatizutoz.pdfIn PDF document text
    • https://site-1166598.mozfiles.com/files/1166598/74368445934.pdfIn PDF document text
    • https://popekuzukije.weebly.com/uploads/1/3/4/4/134471955/lufutekidivizisoli.pdfIn PDF document text
    • https://gajegebukorivip.weebly.com/uploads/1/3/4/4/134487765/pexozadapefa.pdfIn PDF document text
    • https://site-1178100.mozfiles.com/files/1178100/battle_of_gods.pdfIn PDF document text
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/nujolabunef_sovevamuzuri_xuwaxesasiw_magosezogife.pdfIn PDF document text
    • https://najusijas.weebly.com/uploads/1/3/5/4/135400897/nuxidopute.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/zobuwubedak/ringtones_2018_telugu_naa.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/white_tiger_izzy_bizu_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/pixelipovugawojifokinow.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_off0000eb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5F 4916 bytes
SHA-256: 3fdb15671a6cd6dfe771812b12fd3bb6526634f964e304d229c96a04a0351ab8
font_01_sfnt_off0000fc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1A 11628 bytes
SHA-256: bb2f85fb41ed9b4ff5df28f7fb8259197edc0f8635c5dcc70955da7dec60e741