Malicious PDF — malware analysis report

Static analysis result for SHA-256 837d590b5199fdad…

MALICIOUS

PDF

78.1 KB Created: 2021-01-18 04:58:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 089594872c201b9ff42546de3f892d9d SHA-1: 75f9ea43e16e6058729d938138fb5fcb99d9ce67 SHA-256: 837d590b5199fdad50875789e6312891f10579b2d8f53673c02262549c0c5af4
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs and the document body, though obfuscated, point towards a lure to external malicious content.

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
  • 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://trafffe.ru/123?utm_term=dish+wally+receiver+specs PDF link annotation
    • https://cdn.sqhk.co/firumefetev/ifihXsW/mopalovuvefejedotosibotiz.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/jihYAM2/81836273296.pdfIn PDF document text
    • https://cdn.sqhk.co/kenoramof/2ToLtid/widasi.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/ihgjNid/artillery_sidewinder_x1_3d_printer_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunudixa/O8gigcv/guwilegirekisiwagazufu.pdfIn PDF document text
    • https://vifazadaza.weebly.com/uploads/1/3/4/8/134883600/2958118.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/edgeXQ6/download_color_changer_pro_root.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/hdheTNZ/lefuveserofobabul.pdfIn PDF document text
    • https://cdn.sqhk.co/bevurokakug/djixWKd/history_pockets_ancient_egypt.pdfIn PDF document text
    • https://cdn.sqhk.co/latusetime/ijbijfq/83945331205.pdfIn PDF document text
    • https://tupirusu.weebly.com/uploads/1/3/4/7/134702138/vipibokonetabexajati.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/ajccvhi/38300273671.pdfIn PDF document text
    • http://puralivivupose.iblogger.org/high_frequency_oscillatory_ventilation_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/xeliwiwogivo/YhjcUgF/74127956648.pdfIn PDF document text
    • https://binikefesomeb.weebly.com/uploads/1/3/5/3/135386190/c35a082.pdfIn PDF document text
    • https://cdn.sqhk.co/mowasikuso/ibgig82/bizazo.pdfIn PDF document text
    • https://site-1175879.mozfiles.com/files/1175879/36305210822.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://zijipowatik.epizy.com/game_battlefield_1_highly_compressed.pdfIn PDF document text
    • http://gapisoga.rf.gd/11829314729.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_off0000e8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FD 4764 bytes
SHA-256: e2824e5368d561a8d0cfaadcc8124ca5066a25d83d5b5cf7a0b0693caa6d3bfd
font_01_sfnt_off0000f950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF950 10544 bytes
SHA-256: b8ba95adca4ce3a9f4cceaeac5e074c80812254accc3243fa311376b1214cb67
font_02_sfnt_off00011d6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.