Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7989a5493dfb5c0…

MALICIOUS

PDF

74.1 KB Created: 2021-03-22 13:21:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a8b455d95ee298855c7d2e0811f4f2ef SHA-1: f579b1def9691a17da53e08abd871d4d0e2006a0 SHA-256: b7989a5493dfb5c0bd4f0285d1d6a488968b809881cac00400c9df94caff41d3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to crocheting, which is used to disguise the malicious intent of directing users to external, untrusted websites.

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://gimoguvi.ru/aws?utm_term=how+to+crochet+a+circle+into+a+granny+square PDF link annotation
    • http://mpvideo.org/pumowuxedebe8nt21.pdfIn PDF document text
    • https://vapaniwagivu.weebly.com/uploads/1/3/4/4/134442769/lupedivopas.pdfIn PDF document text
    • http://tpdreport.com/fubukegiravufekuzedufoaf3v.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/7Uiljcs/tolikovamidokezovobaworap.pdfIn PDF document text
    • http://kazaxukiga.getenjoyment.net/gentilicios_delas_provincias_de_espaa_por_comunidades_autonomas.pdfIn PDF document text
    • http://rankingcoach-seo.com/does_medicare_pay_for_alert_buttonsgkd1x.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/cgigdgg/tulidisimawuxekakadagevis.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/love_story_movie_2020_new_hd.pdfIn PDF document text
    • https://savapavazatu.weebly.com/uploads/1/3/4/6/134677348/vimofupifen.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/gdWRjeO/scary_maze_game_2._0_prank.pdfIn PDF document text
    • http://complect-tech.ru/ropesp49ec.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/fizaxo/centring_sheet_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/summary_of_the_story_the_fisherman_and_his_wife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5469b47-b45b-4afc-842d-fbccc8843cc7/story_of_your_life.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/best_guided_meditation_podcast_for_sleep.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/kexuxobizipog.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/animation_boy_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17781092-1916-4fcb-a827-abf807ecaa96/95525763706.pdfIn PDF document text
    • http://pesetunal.onlinewebshop.net/richland_township_cambria_county_zoning_ordinance.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B3 5344 bytes
SHA-256: 64592dbfbcf8fdb591b87d35a122f44396b68bab3d967db023eb3d2aa9314dc9
font_01_sfnt_off0000f6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EF 10688 bytes
SHA-256: 529e19b4f69db9b8400eace196f2d591d945eec4520d05dff9e673b29218c2f5

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