Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68beaf31e31c0c7…

MALICIOUS

PDF

67.2 KB Created: 2021-03-03 05:05:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 217d7d7600b8002e7117b3a778de42cc SHA-1: b7c67dd63f2e2d80f23d303acc73d54f9da3858d SHA-256: b68beaf31e31c0c75290efedbcf857501f0db8a0832d23cc51627df8a75dcb33
244 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are hosted on disposable domains or known malicious redirectors. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded links suggest an attempt to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://dafemum.ru/strik?utm_term=sundance+optima+spa+replacement+pillows In PDF document text
    • https://kotuposa.weebly.com/uploads/1/3/1/4/131406283/pofiv_musolewefivasat.pdfIn PDF document text
    • https://widufosonetorif.weebly.com/uploads/1/3/4/5/134598319/porexudif-gepewanovaki-babigovorev.pdfIn PDF document text
    • http://intereriia.com/coleman_powermate_4000_watt_generator_spark_plug95loh.pdfIn PDF document text
    • http://metalllift.ru/megemogofirixilakemamemhetz7.pdfIn PDF document text
    • http://opencabinets.xyz/wallpaper_hd_happy_new_year_2019q0pj6.pdfIn PDF document text
    • https://sojekaga.weebly.com/uploads/1/3/1/0/131070529/0a75d6.pdfIn PDF document text
    • https://kasezikibojeg.weebly.com/uploads/1/3/1/8/131871727/lamigutav.pdfIn PDF document text
    • http://afracheat8.xyz/90443459131nc6aj.pdfIn PDF document text
    • http://organic-ita.space/523786348883id1r.pdfIn PDF document text
    • http://leledup.mypressonline.com/diloxo.pdfIn PDF document text
    • https://rebomavarel.weebly.com/uploads/1/3/4/8/134883959/786112103.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/wiwuxot/55991280935.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/49184088663.pdfIn PDF document text
    • http://ladurabazidema.onlinewebshop.net/samumuzolodipo.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_off0000c946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC946 5412 bytes
SHA-256: 3f4c525a11e8d53297cfc6c0fb3992e27bb2cdadff2ffb73e77da3c1f6424d50
font_01_sfnt_off0000dba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA9 10624 bytes
SHA-256: 79267d78af3b7eda2cc0d865315d58a1eb49e360c4e79ab2a7dc396edbf81ed5

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