Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e86f1544bd211a…

MALICIOUS

PDF

72.9 KB Created: 2021-01-29 21:39:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 25392d0ce3dc95e73870f065ee9e0fd3 SHA-1: fd993d11b5f79998d0aee51ebb42707030cae03a SHA-256: 52e86f1544bd211a88f2f68c5ea6eef1265476ae3986d5e4795b65bce3302aee
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/shook?utm_term=barcode+scanner+for+android+2.+2+free+download PDF link annotation
    • http://help-business-media.com/probability_shiryaev_downloadl22rm.pdfIn PDF document text
    • https://furamakivagoj.weebly.com/uploads/1/3/0/8/130814247/80e6d.pdfIn PDF document text
    • http://naturagrush.space/21074219615z3n2m.pdfIn PDF document text
    • http://lazerepil.site/taniranurabanazekubo4ma7w.pdfIn PDF document text
    • http://help-copyrighteamservice.com/lifunewapavoj3nsa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kanosejimu.rf.gd/lefezuzizoluti.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/game_brigandine_grand_edition_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/88545410575.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/sultan_abdul_samad_building_report.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/android_studio_install_ubuntu_16._04.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/after_action_review_army_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/nukifagej.pdfIn PDF document text
    • http://vabizawez.epizy.com/lofuzuwusegapagudenalizid.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/3d_army_games_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/annabelle_creation_full_movie_mp4_english.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_off0000e10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10A 5320 bytes
SHA-256: 92feb9fab7b34381847574639e1c0a94d97507520c51cc6a5aebe7e6b9fc6a6a
font_01_sfnt_off0000f349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF349 10416 bytes
SHA-256: 4ae803c193f572c5a22d45fc4726835fb19f9be2543ebf36f4746ac5c904849a