Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7e036684b05b03…

MALICIOUS

PDF

74.8 KB Created: 2021-03-09 18:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 4295994014d3c92a5314bd224cd995f1 SHA-1: 040b5e4b738bcd50ea6200f6d073f1dc74143be0 SHA-256: 4e7e036684b05b034f2eed9e21da3d158826d9cc8f4ce7b4c477bc036d6a9e28
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the PDF structure suggest it's designed to redirect users to potentially malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/wix?keyword=coastal+plains+animals+texas PDF link annotation
    • http://nedabemimekoz.iblogger.org/73440071066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408589/normal_6041cf100aa6a.pdfIn PDF document text
    • http://tactical-jacket-sale.shop/why_did_hugo_weaving_hates_red_skull5l8cj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385853/normal_5ff025c35d216.pdfIn PDF document text
    • http://vavoferidedodif.66ghz.com/diziler_soru_zmleri.pdfIn PDF document text
    • https://zororoxuz.weebly.com/uploads/1/3/4/3/134309160/bisifo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471969/normal_60355c7957b7d.pdfIn PDF document text
    • https://kowabimope.weebly.com/uploads/1/3/4/3/134359524/xadipolosateg-wuwalav-kiguvobil-monudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_5fe95155a7ccd.pdfIn PDF document text
    • http://findattime.com/linomagewulilau9jnc.pdfIn PDF document text
    • https://faxororawanemo.weebly.com/uploads/1/3/4/2/134235350/kitilid.pdfIn PDF document text
    • https://cdn.sqhk.co/videmixolute/dshiijd/apple_message_tone_bell.pdfIn PDF document text
    • https://cdn.sqhk.co/gowomawabude/ihiMAeE/classic_space_shooter_galaxy_blaster.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481417/normal_600e4c7996069.pdfIn PDF document text
    • https://retowukiri.weebly.com/uploads/1/3/4/5/134592720/tibemojoketuwiz_vepijis.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/petubapizo/78340097752.pdfIn PDF document text
    • http://vedudide.rf.gd/why_is_my_carpet_cleaner_not_working.pdfIn PDF document text
    • http://luwikomoxure.epizy.com/hollow_wooden_surfboard_plans_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/taduven.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/woxon.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/23959987213.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/cancel_soundcloud_go_subscription_android.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_off0000ea3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3E 4840 bytes
SHA-256: a43314a0700b72797adf3747f17c68bec587a6619fb30efbe01b5deb77c22c33
font_01_sfnt_off0000faa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA6 10488 bytes
SHA-256: fe4cf4df875793560e3f330302a3534489ed6f5cb4879995e6526ebf5f88e841

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