Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22c4d7647c6b332…

MALICIOUS

PDF

94.1 KB Created: 2021-01-31 14:24:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 917c21accab6accf8c4706ed13401066 SHA-1: a1f1a0b4f5ac018cdbeb88c0ece1580c054a645d SHA-256: f22c4d7647c6b332eae99e05e26e4d42c66c938990725e0b9dd8cc6fc51b5de2
196 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
  • 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.
  • 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://jacksth.ru/aws?utm_term=accounts+balance+sheet+format+excel PDF link annotation
    • http://mamajan.space/pokemon_go_friend_codes_2020_july134ao.pdfIn PDF document text
    • https://cdn.sqhk.co/fizuborugas/he0hMic/maternal_secrets_movie_trailer.pdfIn PDF document text
    • https://wavinibavuma.weebly.com/uploads/1/3/1/3/131398010/1616601.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386842/normal_60047fc619f0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483586/normal_5fcc48e5019ea.pdfIn PDF document text
    • http://reform-st.ru/5357739574duqjv.pdfIn PDF document text
    • http://ipoteka.net/83304803040vtzq5.pdfIn PDF document text
    • http://jsexj.fun/kuxixifagf5zy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409797/normal_600be0a65570c.pdfIn PDF document text
    • https://vumiluvitut.weebly.com/uploads/1/3/2/6/132696113/8746444.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/kiguteperilodu/2350503004.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/jasper_report_maven_example.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/beethoven_2_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/83638102043.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/collapsible_door.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/arabic_music_hd_video.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/mail._ru_group_ltd_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/obituary_template_for_father.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_off00013435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13435 5320 bytes
SHA-256: 930c370c80b988c4824e5c66858e0638c2fe804e0967d344c9bf16082c193d03
font_01_sfnt_off00014627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14627 10996 bytes
SHA-256: 47f21b4b7ae560b6deaa7d52b8d0e3aabae32e58aa937e6d71c5f40782e4ddca