Malicious PDF — malware analysis report

Static analysis result for SHA-256 13de93c499f4bf4d…

MALICIOUS

PDF

72.7 KB Created: 2021-02-27 07:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 52983b4646bbf4832034440aa5893d72 SHA-1: 447a008ea56e893c466e34045c4afa1b2d46042a SHA-256: 13de93c499f4bf4d65dc2382ce8e53d65cab721a3ce2a05253de46f2c96bfd17
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://maypoin.ru/wix?keyword=skyrim+old+hroldan+ghost PDF link annotation
    • https://pifujikis.weebly.com/uploads/1/3/4/8/134875168/tatogifazi.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/pojab.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/pizowulipejarijavojaze.pdfIn PDF document text
    • https://muzezibabut.weebly.com/uploads/1/3/0/7/130739211/2631336.pdfIn PDF document text
    • https://dikoriwapajok.weebly.com/uploads/1/3/4/4/134447187/e33b7d4ad24e721.pdfIn PDF document text
    • http://espaceclient-cmb.com/74242470829ujpey.pdfIn PDF document text
    • http://dfwshootersupply.com/puwagazalermmyir.pdfIn PDF document text
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/miralemovebukuwux.pdfIn PDF document text
    • http://mybatut.store/93173058879wdt62.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/zuxime/andaman_and_nicobar_islands_images.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/bitmap._config._argb_8888_in_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/parts_and_functions_of_bacterial_cell.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/drill_hole_through_sheet_metal.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/jaril.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/kakilafi.pdfIn PDF document text
    • http://mapexas.epizy.com/cognitive_ability_test_questions_and_answers.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_off0000e0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A9 5508 bytes
SHA-256: d52b5c2540ef70d4a1a0267fe4fb874f9b1ae14452932faf88be6d9cd5a98824
font_01_sfnt_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 10048 bytes
SHA-256: 8724539a16dd134aa4e86002a6be3468e8632c8fdbbee17da59b68e5acfb8960