Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed6cd282d2ad15a4…

MALICIOUS

PDF

71.0 KB Created: 2021-03-01 17:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 07fb252b7a5f6657e0c03bfcbc5e107a SHA-1: 5627a4c09944da4aceb11e49f76a5463cb6b4ed5 SHA-256: ed6cd282d2ad15a41a9c48a1fd2f414cc2cf3b86996d9ddaa28aff4205495b32
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links pointing to disposable hosting domains, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics strongly supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://nipisod.ru/award?keyword=char+broil+oil+less+fryer+owner%2527s+manual PDF link annotation
    • http://dajexori.mypressonline.com/nagugeg.pdfIn PDF document text
    • https://folejate.weebly.com/uploads/1/3/4/9/134902611/d3c0d0a.pdfIn PDF document text
    • https://xobiduri.weebly.com/uploads/1/3/1/4/131437628/rasefewalo.pdfIn PDF document text
    • http://selolaz.66ghz.com/livunugur.pdfIn PDF document text
    • https://sarajifig.weebly.com/uploads/1/3/2/7/132710715/kibotezakamuxi_meresosex_sogenuv_dujupafu.pdfIn PDF document text
    • https://zokaduxenatased.weebly.com/uploads/1/3/1/6/131637020/xovuwigixapabenu.pdfIn PDF document text
    • https://cdn.sqhk.co/mitukutowum/ogdghji/real_car_parking_parking_master_apk.pdfIn PDF document text
    • https://mafalipakirufez.weebly.com/uploads/1/3/5/3/135347960/8216146.pdfIn PDF document text
    • https://cdn.sqhk.co/momugutatok/jikjahi/53629902890.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/rigugu.pdfIn PDF document text
    • https://koneligave.weebly.com/uploads/1/3/4/5/134581264/xupuvonefupu_venumatagozi.pdfIn PDF document text
    • https://kekorozonositen.weebly.com/uploads/1/3/2/7/132710750/9116267.pdfIn PDF document text
    • http://kemotunitajifap.iblogger.org/script_template_doc.pdfIn PDF document text
    • https://cdn.sqhk.co/rijakobebux/hfhdDif/86838215575.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tiguvazigavis.epizy.com/st_louis_blues_sheet_music_guitar.pdfIn PDF document text
    • http://tikomiwewo.atwebpages.com/difference_between_synthesize_and_summarize.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/bareilly_ki_barfi_movie_filmywap._in.pdfIn PDF document text
    • http://gixuzako.rf.gd/vatuporugoxopan.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/gi_sheet_conversion_square_meter_to_kg.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB79 5200 bytes
SHA-256: 8629baa0ef721cf059a7c1e58f0d2fee6de34b5ae25578f6afc350db9ca9dd07
font_01_sfnt_off0000dd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD15 10520 bytes
SHA-256: e38cfabd31ea8a9d554c490d6c3e526a88acc99b57045ce19326d4a82b4d8c5c
font_02_sfnt_off000100ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AE 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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