Malicious PDF — malware analysis report

Static analysis result for SHA-256 75806fd34dca5cce…

MALICIOUS

PDF

87.2 KB Created: 2021-04-15 21:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f2a30ddbfb52340ac2c98ef964afe8b1 SHA-1: 2d2537a55cc0b40cd8572456f45e9eae2dd0f2dd SHA-256: 75806fd34dca5ccec5c2b34f9224827d110c60ca1140cdfed10b817b7e6e65ee
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. These links point to various domains, many of which appear to be disposable or used for SEO spam. The ML_NYX_PDF_MALICIOUS and ClamAV detections confirm the malicious nature of the file. The primary attack pattern observed is the use of a link farm to direct users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://baarspo.ru/strik?utm_term=what+is+graphical+method+in+lpp PDF link annotation
    • http://whitecheat.xyz/494444597198lvlj.pdfIn PDF document text
    • http://yourlivehelp.com/52125707700t5211.pdfIn PDF document text
    • http://ccckkkkk.space/cbs_sports_tv_guidehs1z7.pdfIn PDF document text
    • https://tuzutetenufiro.weebly.com/uploads/1/3/4/7/134716615/weravinat-lopalus-wawaxadoze.pdfIn PDF document text
    • http://smartradiobf.ru/algebra_2_testkmgv7.pdfIn PDF document text
    • http://arendagg.xyz/limuvoparadowilodu56gqt.pdfIn PDF document text
    • https://visopitolunew.weebly.com/uploads/1/3/1/4/131483219/bubifowu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481064/normal_5fdd76231ca42.pdfIn PDF document text
    • https://torenamabaj.weebly.com/uploads/1/3/4/4/134486332/zesunetipo.pdfIn PDF document text
    • https://cdn.sqhk.co/gidetixi/tjc4ihU/2048_shoot_n_merge_block_puzzle.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/charbroil_gas_grill_burner_replacementgdwd5.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/cicicif/30145071574.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/ZDlagdb/93107476865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497650/normal_5fd27a32e7e12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478438/normal_5fde5b4387696.pdfIn PDF document text
    • https://dobuzitususuv.weebly.com/uploads/1/3/4/4/134470967/xazawov_mirunap_resoboziwokipi_gofinujusajafid.pdfIn PDF document text
    • http://cmbespaceclient.xyz/resumo_sobre_qumica_orgnica_nomenclatura6e3j1.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
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_8bc3b6024b264e008a9563cc2c17381b.pdf?index=trueIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_5271272c2a95403a98a72f1112912f8e.pdf?index=trueIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_2371a5fd3e9a4059b59b0dc52cf961d7.pdf?index=trueIn PDF document text
    • https://67dbe094-6b68-4a2c-870f-9bd980043d88.filesusr.com/ugd/cff74a_125b041ed48e47479289660a5be3a784.pdf?index=trueIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_23a0b1eadc6843368d46ff12cbf7aef7.pdf?index=trueIn 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_off00010a0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0F 5288 bytes
SHA-256: fcf04d188a15f274bab4dd90019d2b49c4ba31aab362cb3851e53724ea923c15
font_01_sfnt_off00011be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE6 11156 bytes
SHA-256: e62d8c2ff3ebd0e90d845172e231b504318da73a92906684ed613d9ec0175a1a
font_02_sfnt_off00014118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14118 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3