Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2febda9bacb3f8c…

MALICIOUS

PDF

73.8 KB Created: 2021-03-09 14:46:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 52f47653c1b6af8b22dc16a4cbd47013 SHA-1: 0c52769066cd48031a80838b71a102714a58ecd4 SHA-256: a2febda9bacb3f8c16ed298d33d1abc5481295f3bad007ec28b344f3126852b4
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URL `https://soxebez.ru/strik?utm_term=how+to+change+a+thermal+fuse+on+a+whirlpool+duet+dryer` is particularly suspicious and likely leads to a malicious payload or phishing page.

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://soxebez.ru/strik?utm_term=how+to+change+a+thermal+fuse+on+a+whirlpool+duet+dryer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4505687/normal_602ad16d509ec.pdfIn PDF document text
    • http://daating19.site/dell_inspiron_n5010_dc_jackx7pyn.pdfIn PDF document text
    • https://sofupikibir.weebly.com/uploads/1/3/5/3/135302021/3505bb71.pdfIn PDF document text
    • http://copyrightreports.com/how_to_add_rinse_agent_to_dishwasheronryz.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/7128879258.pdfIn PDF document text
    • https://cdn.sqhk.co/pibutuvopedu/XoBidgd/mercuryo_bitcoin_crypto_wallet_review.pdfIn PDF document text
    • http://organic100.fun/labibuwigikosekevudenawuaeqn.pdfIn PDF document text
    • http://savadaqwe.space/28364529184058ul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417670/normal_60431d3c590f4.pdfIn PDF document text
    • http://natorg.fun/mobile_kitchen_rental_floridaofrqy.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/ca_drinking_water_standards.pdfIn PDF document text
    • https://gukufevekexuse.weebly.com/uploads/1/3/5/3/135305262/b335a246.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/86158883351.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371799/normal_60039dd0d8fba.pdfIn PDF document text
    • https://cdn.sqhk.co/dosazuleg/gPmCsQR/wesutopi.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/8197798073.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/rokuwapesu/zigijawivutij.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/ecommerce_template_html_free.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_off0000e15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15E 5724 bytes
SHA-256: 9d9fc5f6ece764045a74ea3c4e59908f43a08cbc01b91125416a1845981b7530
font_01_sfnt_off0000f4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CA 10760 bytes
SHA-256: faf9c2938444b7a95d518e3d8b5cb161750bd0e63a5571e7c11f34f4010b3fc2

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