Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb3dd3a2dcccf44…

MALICIOUS

PDF

90.1 KB Created: 2021-03-17 03:25:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e5ce4a69b52e2044b2538f5a0738754f SHA-1: 291ec67dd8e88a9ccececf4a86b7bf487dd28734 SHA-256: bdb3dd3a2dcccf446cfe5f862290c46405e074dfe189e47e1ff2ad806a522a80
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to SEO-optimized redirectors and potentially malicious PDF files. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK indicate a deliberate attempt to create a link farm for SEO purposes, likely to distribute phishing content or malware. The embedded URLs and the ClamAV detection strongly suggest malicious intent, specifically phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=priest+healing+spells+vanilla PDF link annotation
    • https://kepudeveru.weebly.com/uploads/1/3/4/6/134698703/bumaxolewarit.pdfIn PDF document text
    • http://padojobimo.mywebcommunity.org/dorof.pdfIn PDF document text
    • https://cdn.sqhk.co/remokuvupen/mPhh9jf/skin_tools_pro_ff.pdfIn PDF document text
    • https://benefirezunaxo.weebly.com/uploads/1/3/4/8/134864331/5993552.pdfIn PDF document text
    • https://cdn.sqhk.co/divoxisig/iBBt17b/tixebaxowukuxojaxanosa.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/1jejbhg/nitro_rc_trucks.pdfIn PDF document text
    • https://vijarijun.weebly.com/uploads/1/3/2/6/132695649/ninizafodegogoma.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/9893787.pdfIn PDF document text
    • https://fiwebafifike.weebly.com/uploads/1/3/4/8/134885554/60d9b45d.pdfIn PDF document text
    • http://majikok.mygamesonline.org/it_jobs_in_demand_in_south_africa.pdfIn PDF document text
    • https://cdn.sqhk.co/dedesonor/4msijC2/hello_neighbour_act_1_ps4.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/xalasawu/37552956355.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/jail_report_rome_ga.pdfIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_b58d4548ee184deb8d6e804b36d7b219.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vazisi/53071739602.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/31146068868.pdfIn PDF document text
    • https://089130c0-62ae-4bf1-a93c-656440fe8451.filesusr.com/ugd/738632_0797452c353842f0883e4dfb0dd4612a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rowubunak/5701580023.pdfIn PDF document text
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_de4305a0195f4b39a48a5f9e26bf628f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/alcatel_one_touch_idol_3_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/sharp_xe_a102_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/john_deere_pro_gator_2020_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/best_rap_beat_ever.pdfIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_140a5bacd51f4aaf879a459d5684bb56.pdf?index=trueIn PDF document text
    • http://us.battle.net/wow/en/media/artwork/trading-card-game/series1?view=tcg-series1-186PrayerIn 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_off00012221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12221 5144 bytes
SHA-256: 4fc6da1b3bf1e94c38fbfc40a92303e4047e5544f59fa795c477255a74761edc
font_01_sfnt_off000133a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A3 11368 bytes
SHA-256: 4eec9f9783a870bfa50f5a3e53ded5301d3550dc6f41e79da4f0fea57fdbcf0e