Malicious PDF — malware analysis report

Static analysis result for SHA-256 b047a758de80b3aa…

MALICIOUS

PDF

73.9 KB Created: 2021-04-28 09:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b48c6abdb55931d507baaae6a254b365 SHA-1: d1ed1b7d154219c7da47be15bf08aaa61f266766 SHA-256: b047a758de80b3aac364c2d4394cb9e8b0603609caf67d0ae2ad56209bfb8f83
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected 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 designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of numerous external URIs points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/strik?utm_term=math+discourse+sentence+starters PDF link annotation
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/pojuburuzaxotu.pdfIn PDF document text
    • http://pupijepu.22web.org/wakabiniribemeviguboja.pdfIn PDF document text
    • https://nolutoxut.weebly.com/uploads/1/3/4/6/134683805/ed662d6dbff51cf.pdfIn PDF document text
    • https://tinubuwetoka.weebly.com/uploads/1/3/5/3/135325034/nipuzegexenevi_wasadagovukobi_bixomil_leronopelat.pdfIn PDF document text
    • http://tifanagapi.22web.org/monitor_cardiaco_speedo_66002g0emnp1.pdfIn PDF document text
    • https://puponefunojubuf.weebly.com/uploads/1/3/4/6/134670615/burebemogad.pdfIn PDF document text
    • http://wurigebajufopo.22web.org/pioneer_vsx_521_k.pdfIn PDF document text
    • https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/1336678.pdfIn PDF document text
    • https://zipawesijapa.weebly.com/uploads/1/3/4/4/134494223/puxutunadajijixo.pdfIn PDF document text
    • https://velalozelo.weebly.com/uploads/1/3/4/4/134498802/1712078.pdfIn PDF document text
    • https://xagapetudiza.weebly.com/uploads/1/3/4/6/134686513/4adda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_37d7b94a34e44bbbbed2bc62ad540788.pdf?index=trueIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_2b9641c9146141bbb084bb0d1b4d1d4d.pdf?index=trueIn PDF document text
    • http://xutenujute.myartsonline.com/58744570717.pdfIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_31927aa899994467ad23348f23943066.pdf?index=trueIn PDF document text
    • http://gozebodene.rf.gd/saaho_video_songs_telugu_wapwon.pdfIn PDF document text
    • http://xososalubebejen.rf.gd/63891663099.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/36760978897.pdfIn PDF document text
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_3be27608267b4de5bb344aa508e8a7df.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d45674ea-4d4f-4d08-937b-a34cda5386ee/15869798101.pdfIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_6b3aa9290b734a4eb0308611f6192c94.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f9344ce-e528-41cb-abf5-474312f1c119/do_kitchenaid_mixers_come_with_a_dough_hook.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_off0000e420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE420 5000 bytes
SHA-256: 1f658816f974c0fd32b2895b973c970d6ec17a44d3c8e082f03e5c9ea653a9c9
font_01_sfnt_off0000f524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF524 10868 bytes
SHA-256: bfa7464f20847fe5fe86ff5b69016d32a9bf651b4d141c3113e9bd9d0f4250b8

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