Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae48044d03950ad…

MALICIOUS

PDF

74.9 KB Created: 2021-04-19 23:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 14ee31ff224c57c453a71a4084d5d95b SHA-1: c1d25c9b715b2ba3d9b13f3776bffc9744b9131a SHA-256: 1ae48044d03950adaf06b95accff7281a3f122386a7f67dd4c128cd399fa5e5b
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=how+to+use+rival+meat+slicer PDF link annotation
    • http://keruluzo.medianewsonline.com/74347813589.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/qjfxhiT/kelime_incileri_apk_android_oyun_club.pdfIn PDF document text
    • https://cdn.sqhk.co/falugojafat/gdcP1SD/video_twitter_for_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/pewonogip/hf5hikC/android_17_vs_goku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490930/normal_6056a73416bdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426409/normal_605b4662a0988.pdfIn PDF document text
    • http://nerazegizetikam.getenjoyment.net/rofow.pdfIn PDF document text
    • http://igcopyrightclient.com/dipilubuwatozumome0bk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443371/normal_6044634a6aee9.pdfIn PDF document text
    • https://cdn.sqhk.co/xugiwatokax/e9hdhbg/bandish_film_songs_free.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/LqijLUi/vidawipopijumasi.pdfIn PDF document text
    • http://italy-small.space/90624685741ec8ee.pdfIn PDF document text
    • http://ziposodepow.mywebcommunity.org/vba_excel_tieng_viet.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/gDhiidH/zombie_crime_shooting_games_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391909/normal_603c58827bbd6.pdfIn PDF document text
    • http://fejugutafilevin.scienceontheweb.net/53971630575.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_763e7111417844bca099e00e1c2e39e4.pdf?index=trueIn PDF document text
    • http://velelakolifuvu.onlinewebshop.net/luludowizuvexakosej.pdfIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_99c7978ec04745699de95a98682a2930.pdf?index=trueIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_5917e38a260847489e4bf8fb1c521990.pdf?index=trueIn PDF document text
    • https://6448a590-b571-4b71-a9e4-820b8531b153.filesusr.com/ugd/782be2_3904cea4c52d42a88adaf6c8eb8d5ab8.pdf?index=trueIn PDF document text
    • https://9dc8676a-0e58-44ee-a512-e339c7094702.filesusr.com/ugd/7c0652_598665d2883c43718ef6d6f180ca6ebe.pdf?index=trueIn 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_off0000e81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81D 5060 bytes
SHA-256: 7e65ecd6051467074af78db99451cf4943ae902c3809a927dffbe75d06f5d431
font_01_sfnt_off0000f94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94D 10744 bytes
SHA-256: 6ad625754c23735210ac721e0ec5d05b961748cf10739386103395f5e663af4d