Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8f7bce81317bc4…

MALICIOUS

PDF

86.9 KB Created: 2021-03-01 21:12:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a3969ab679df3027f488d08052d6b748 SHA-1: 410847ebc8ee30818560622fa49a413ced5905e3 SHA-256: 0e8f7bce81317bc4cce38283738d93d5ed6160728cdfa679a3c39f2feedfdf01
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. ClamAV detected this as Pdf.Phishing.Trojan, and ML classification strongly supports maliciousness. The embedded URLs suggest an attempt to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pelibifir.ru/wix?keyword=shadow+hills+high+school PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469828/normal_5fc715dee634b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_6025c48063af2.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/hcgihdm/spiral_hair_perm_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469378/normal_5ffaca9d20a58.pdfIn PDF document text
    • http://egosikenclub.com/ant_video_er_plugin_for_chromerptdu.pdfIn PDF document text
    • https://cdn.sqhk.co/kibizatududo/gnXKwha/miracles_from_heaven.pdfIn PDF document text
    • https://jagedebake.weebly.com/uploads/1/3/0/7/130738918/varagagema-vojave.pdfIn PDF document text
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/baxifadoxemedov.pdfIn PDF document text
    • http://shtangennstutkupitseychas.xyz/wanoxizezimilesura0i293.pdfIn PDF document text
    • https://xafarapodekil.weebly.com/uploads/1/3/4/3/134369556/673012.pdfIn PDF document text
    • http://choosenews.space/clockwise_and_anticlockwise_worksheet_year_1ui9do.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoxewijuja/fO9ieha/44688614670.pdfIn PDF document text
    • http://keto-menu.online/pepper_iron_man_suithjmus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494417/normal_5fe147b61547f.pdfIn PDF document text
    • http://italiahot.fun/tulubulirariyoo29.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/BCFgcpY/45156181592.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417659/normal_60050d3841e26.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/ijidifH/32440721940.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 5300 bytes
SHA-256: 36ccdfeedee04b8038293df7da488440ea4037c75c49738498fc78451e1bbe4c
font_01_sfnt_off00010005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10005 1884 bytes
SHA-256: 296c5f2c0d44730b94ff89f89a6f36cad0c55545f10909f8abd9af2b5c151f3d
font_02_sfnt_off00010926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10926 11024 bytes
SHA-256: 0eef62ceb5fa66dd217d08af6323f5ed8ed8c602a110b7e2ef121398aa01fbff
font_03_sfnt_off00012ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE1 16560 bytes
SHA-256: ea03d693fa8848d32475c165e064e51e19c8b2a561cf2fbcea39e89ccf9aea57
font_04_sfnt_off00014575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14575 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d