Malicious PDF — malware analysis report

Static analysis result for SHA-256 0526d5cf763ea8d1…

MALICIOUS

PDF

76.4 KB Created: 2021-03-30 19:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9dcce815f8318f35a2f7dc132f15f00a SHA-1: b4f200911f0a84cde8cfa87c49734fe99975c646 SHA-256: 0526d5cf763ea8d138324d3483cbbf964da31e96c3bfca3dae4147d4b74c77c5
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to search terms and application metadata, indicating a lure to disguise the malicious intent. No scripts were extracted, but the overall structure and URL analysis strongly suggest a phishing or malware distribution campaign.

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 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://maypoin.ru/123?utm_term=brescia+juve+formazioni+probabili PDF link annotation
    • https://dobabolomibela.weebly.com/uploads/1/3/2/6/132681713/pajoned.pdfIn PDF document text
    • https://gerivelizozil.weebly.com/uploads/1/3/4/1/134131902/tomawasuxiwawuwurufu.pdfIn PDF document text
    • http://duplicwcnj.space/gunadumoroxogaduwesepivedieltq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483589/normal_60160d9b4b3da.pdfIn PDF document text
    • http://detonic-italy.website/pedigree_worksheet_biology_1_answersaibwr.pdfIn PDF document text
    • http://torchqbfl.fun/161097432070m66c.pdfIn PDF document text
    • http://kawlites.online/tamil_movie_arumugam_full_movieatpmy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478688/normal_6013933c2de01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418556/normal_6054477015f9d.pdfIn PDF document text
    • https://cdn.sqhk.co/fakodozug/OwjhicX/block_puzzle_jewel_free_download_for_pc.pdfIn PDF document text
    • http://selectgetc.top/jawevavapogomifujileg6fhwa.pdfIn PDF document text
    • https://cdn.sqhk.co/fomolunuvufa/ahfUp3G/12853311746.pdfIn PDF document text
    • http://usecabinets.xyz/gavijugapokuledrd6e.pdfIn PDF document text
    • https://cdn.sqhk.co/nogugojuri/eT7SQge/dixidujafekofolonove.pdfIn PDF document text
    • https://gijesilikisuzid.weebly.com/uploads/1/3/2/6/132683000/dawimijetenive-kavabuxevemem-sawuwibi.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/ojadgh8/58464298543.pdfIn PDF document text
    • http://instapriz24.online/83986994147cistz.pdfIn PDF document text
    • http://golden-bridge.pro/vicks_humidifier_filter_targetc7pjn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451019/normal_5fcd9f5e710af.pdfIn PDF document text
    • https://rarejitidod.weebly.com/uploads/1/3/5/9/135993923/nuliwaruf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389606/normal_5ffef22a057ff.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/wuwabobujasivor/organel_sel_hewan_dan_fungsinya.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/birewimixebolinonevute.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/bionic_woman_2007_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/30945168088.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_off0000ecde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDE 5536 bytes
SHA-256: 228df47e743bc669a9738d712878234ded9b86ca67415afafc35d5b63a37c6ce
font_01_sfnt_off0000ffb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB0 10960 bytes
SHA-256: 2c35920cfe447d9159ed8c6a3789ed836d98a1ea6777a7ee909c14171f46f5b2