Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcaa075290ae157a…

MALICIOUS

PDF

70.3 KB Created: 2021-03-02 04:26:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f451658cdc970583f63e1fb7bfbf64e6 SHA-1: 1b7b50ce2b542e33009a2fc33d0a10e7d7d20ae6 SHA-256: bcaa075290ae157a88bcfb2495927841208d6812519567d197ece139c9aa5633
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://fokemale.ru/wix?keyword=tank+trouble+3+unblocked+games+66+at+school PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366947/normal_5fc93ba6d76df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419437/normal_603d7c2c1c645.pdfIn PDF document text
    • https://numeroluxovuz.weebly.com/uploads/1/3/4/7/134733954/9571faac302e188.pdfIn PDF document text
    • https://manesufepal.weebly.com/uploads/1/3/1/3/131381078/4fb64a525c825.pdfIn PDF document text
    • http://medicinfo.online/dark_alliance_release_date_2021n25c7.pdfIn PDF document text
    • https://nojufetabug.weebly.com/uploads/1/3/4/7/134748112/e562e6fb42ba23.pdfIn PDF document text
    • https://rilitovewub.weebly.com/uploads/1/3/4/0/134095842/596550.pdfIn PDF document text
    • https://zuvumurujibuza.weebly.com/uploads/1/3/0/7/130739557/3901836.pdfIn PDF document text
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/2296769.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475572/normal_5fcce0f950b12.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/gotenukevepunin/bepupobidinirefude.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/guidelines_for_the_mothballing_of_process_plants.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/akhiyan_ne_ronaoy_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/charterhouse_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/the_big_fat_surprise.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/28683166252.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_off0000d5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C5 5824 bytes
SHA-256: 96bb6c886e73f026820e7eb56f1dc7c396a79b764b5bb692a1cc4507a3086f5c
font_01_sfnt_off0000e966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE966 10028 bytes
SHA-256: 8f5e8e9c85d7981eee10a1e316eb9fb1842d64cef1a4736c7586d582288405fd