Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d30da80c1270ccb…

MALICIOUS

PDF

75.1 KB Created: 2021-06-06 20:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f0b383004a356b88493daf67bd2b226f SHA-1: 96d2e571c2d509911a4e1cc3b2a8aab2a6f9a415 SHA-256: 8d30da80c1270ccbca4e8a88807adc2f9963d97444d00b5a034ef7d3281171b5
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, containing numerous external URLs that likely lead to malicious content or phishing sites. The document body, though heavily obfuscated, contains references to 'Hercules' and 'dublaj izle', suggesting a lure to attract users interested in media content. The presence of multiple disposable hosting domains and UTM parameters indicates a coordinated effort to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://philabc.ru/pbw?utm_term=hercules+efsane+ba%25C5%259Fl%25C4%25B1yor+t%25C3%25BCrk%25C3%25A7e+dublaj+izle PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390350/normal_603702d730d24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365635/normal_5fc6e0e01a3d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451752/normal_60549e58adbf2.pdfIn PDF document text
    • https://sifuzulujiw.weebly.com/uploads/1/3/4/7/134716539/fujokoxipewazi_jovenosiwaxawin_tufutakofawinu.pdfIn PDF document text
    • https://viropozokuputaj.weebly.com/uploads/1/3/4/4/134441516/2e1ba888507f1.pdfIn PDF document text
    • https://sukutunog.weebly.com/uploads/1/3/5/3/135304197/siramivesadavodewo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421199/normal_601ef89b33e5e.pdfIn PDF document text
    • https://jibabarudemafe.weebly.com/uploads/1/3/4/7/134748102/e61c115f410843b.pdfIn PDF document text
    • https://ridimejaxokixis.weebly.com/uploads/1/3/5/3/135340331/4aa2751d2efd849.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385876/normal_5ffa0a2784d38.pdfIn PDF document text
    • https://kakewexetoza.weebly.com/uploads/1/3/4/6/134693891/c5f30d.pdfIn PDF document text
    • https://tiketarutuluvo.weebly.com/uploads/1/3/4/0/134042831/6582639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469353/normal_5fe76f38ec8ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408463/normal_601143545c2eb.pdfIn PDF document text
    • https://pejifote.weebly.com/uploads/1/3/5/3/135348690/dac94368ed52.pdfIn PDF document text
    • https://pubigomusukuma.weebly.com/uploads/1/3/4/5/134511275/zazizisolerudoxenelu.pdfIn PDF document text
    • https://figiroxofidun.weebly.com/uploads/1/3/0/7/130740151/6071849.pdfIn PDF document text
    • https://salogisamokowo.weebly.com/uploads/1/3/4/6/134649366/1e5487824e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485579/normal_603aa96678fd3.pdfIn PDF document text
    • https://zazozoke.weebly.com/uploads/1/3/0/7/130776388/356cf9d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379222/normal_6068301c020eb.pdfIn PDF document text
    • https://minileponefij.weebly.com/uploads/1/3/1/0/131070526/wuzijukowotalix.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE458 5992 bytes
SHA-256: e26b2e2d28b7afca443f21b52eedbf21571abde51e97ac08bc90fba210993612
font_01_sfnt_off0000f7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AB 11648 bytes
SHA-256: 38bd530ced50d2c00b8334744f77b929ef06ac1bfb5d258460dfb1da101d23dd