Malicious PDF — malware analysis report

Static analysis result for SHA-256 c251459629cb376f…

MALICIOUS

PDF

76.0 KB Created: 2021-01-20 18:02:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: afe6f0cca8df586f022102f5c8c8fa12 SHA-1: 464b1d096a358f85b5c1659a0114f243b5119ccd SHA-256: c251459629cb376f9a9a89be62d14cd379d49a0ebd9972913e4b6facf4f63931
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The document body, though heavily obfuscated, contains text related to 'Avengers endgame free full movie', suggesting a lure for pirated content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • 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://traffking.ru/123?utm_term=avengers+endgame+free+full+movie PDF link annotation
    • http://gixotakopopunod.22web.org/wazutagugizokivujifedak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418188/normal_5ff275b53113e.pdfIn PDF document text
    • https://cdn.sqhk.co/businaxidare/k6H7igd/roblox_download_free_mac.pdfIn PDF document text
    • https://site-1175189.mozfiles.com/files/1175189/ielts_reading_endless_harvest_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/webepinovet/gfhdjgg/kopipemumezog.pdfIn PDF document text
    • https://site-1173833.mozfiles.com/files/1173833/39773864281.pdfIn PDF document text
    • https://site-1204767.mozfiles.com/files/1204767/berita_thandolwethu_music.pdfIn PDF document text
    • https://cdn.sqhk.co/mezugifosa/hhjFJjb/bingo_dice_free_bingo_games_online.pdfIn PDF document text
    • http://fomilexavekol.22web.org/yahoo._co._uk_app.pdfIn PDF document text
    • https://site-1177446.mozfiles.com/files/1177446/87444255685.pdfIn PDF document text
    • https://site-1168096.mozfiles.com/files/1168096/rezuv.pdfIn PDF document text
    • https://cdn.sqhk.co/salijuvam/istjcUn/94227166816.pdfIn PDF document text
    • https://cdn.sqhk.co/reserujaj/hgH9iic/cartoon_channels_on_dish.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f889060c9a1b.pdfIn PDF document text
    • https://site-1178278.mozfiles.com/files/1178278/arap_bahar_ve_tunus.pdfIn PDF document text
    • https://site-1172346.mozfiles.com/files/1172346/71833911187.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xizokokov.epizy.com/resokikapalobolu.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/bed_sheets_egyptian_cotton.pdfIn PDF document text
    • http://futuwerelak.epizy.com/water_cycle_information_in_kannada.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC02 5076 bytes
SHA-256: 9c67141a9a693b429904512f9fda06d7c9e27c62f8e4ba486204ec01e2ca981e
font_01_sfnt_off0000ed2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2B 11468 bytes
SHA-256: 862de6ca53a6228b4c614d2bf4cd4bf9c68ed51d2dc968a63ddc605ceca125d6
font_02_sfnt_off00011338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11338 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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