Malicious PDF — malware analysis report

Static analysis result for SHA-256 b894a75dc76998a2…

MALICIOUS

PDF

77.2 KB Created: 2021-03-28 00:08:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 457ad3703b53c7809bcddb2162a8174b SHA-1: ba447bbc14d822d1ed9aa0f4d8e901bd0c21ceff SHA-256: b894a75dc76998a2be4d127078fb6be33f395d80ef713394214659811ede85cf
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://mezovuduw.ru/aws?utm_term=what+is+esio+trot+about PDF link annotation
    • https://cdn.sqhk.co/sujoxeti/jaLBhjj/tips_for_bitmoji_avatar_emoji_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/hU7jar1/smartthings_login_eu.pdfIn PDF document text
    • http://instapriz.online/menstrual_and_ovulation_calendar4xdxc.pdfIn PDF document text
    • https://cdn.sqhk.co/sebuwemid/egdidha/kofisipazerufotozu.pdfIn PDF document text
    • https://mutabezikubi.weebly.com/uploads/1/3/4/7/134739743/1051481.pdfIn PDF document text
    • https://xorimaki.weebly.com/uploads/1/3/0/7/130739578/bumopetujepirukigano.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/gdgcKmY/i_reward_chart_app_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/PVN6hg8/12832882284.pdfIn PDF document text
    • http://civiliscmq.online/radioactive_decay_problems_worksheet4jhjz.pdfIn PDF document text
    • https://xidelesa.weebly.com/uploads/1/3/4/4/134498911/tawoputovatexon.pdfIn PDF document text
    • https://kiwosetivugo.weebly.com/uploads/1/3/0/8/130874254/tukubug_revavos_muzibowi.pdfIn PDF document text
    • https://tesegedoveveda.weebly.com/uploads/1/3/4/8/134891870/1722364.pdfIn PDF document text
    • https://bupimapigi.weebly.com/uploads/1/3/1/3/131383283/3704760.pdfIn PDF document text
    • http://chambrehq.xyz/brooklyn_nine_nine_season_3_1080paqcxl.pdfIn PDF document text
    • https://defelidiko.weebly.com/uploads/1/3/1/0/131070982/d748588ca230.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/zunaporam/cissp_all_in_one_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/prevost_h3-45_fuel_capacity.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/feganasev.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/fitovejilibuvaxuwugepenes.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/sefilurav.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/vavixu.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/97155050201.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/robert_half_online_time_reporting_login.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/77878348321.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/bazaar_apk_for_ios.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_off0000f301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF301 4892 bytes
SHA-256: a094bd82fb2ce5e217abfa045d3a1c84db39ea47381983629f7ddf84b3d8166c
font_01_sfnt_off000103a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A6 10428 bytes
SHA-256: e2e2d07f80947cc150813d216d4888b1b5fea5cc46f8c827d37acff7eba8260c

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