Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f709feb2396ad43…

MALICIOUS

PDF

67.9 KB Created: 2021-03-01 00:10:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b96e6843339671872e9c0f5351202695 SHA-1: e7271fd36c4796cde7aa4cc9428162b58d0d521a SHA-256: 6f709feb2396ad43ba7b81d6d02efb8e78839c04e957f648bae1debf6e7657fa
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, suggesting a link farm designed to direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or exploitation.

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://lozipotod.ru/wb?keyword=how%20to%20put%20amana%20washer%20in%20diagnostic%20mode PDF link annotation
    • http://jasazotinalol.mygamesonline.org/stairway_to_heaven_chords_intro.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/60da9bb9119f.pdfIn PDF document text
    • https://xekotoruwogobib.weebly.com/uploads/1/3/1/6/131606212/madajosarumu-vedef-bogefel-xizadokeruzukez.pdfIn PDF document text
    • https://nabisafuv.weebly.com/uploads/1/3/1/4/131413222/junevak.pdfIn PDF document text
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/zezexugunaren_wusetuzas.pdfIn PDF document text
    • https://janusutaxukokaf.weebly.com/uploads/1/3/5/3/135347272/5010063.pdfIn PDF document text
    • http://jagidevivuvu.22web.org/99185898900.pdfIn PDF document text
    • https://daxodewime.weebly.com/uploads/1/3/1/3/131398188/d63aa3989f.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/23538040573.pdfIn PDF document text
    • https://xinosete.weebly.com/uploads/1/3/0/9/130968926/9862879.pdfIn PDF document text
    • http://witogitozukifon.iblogger.org/powerpoint_template_free_canva.pdfIn PDF document text
    • https://bivawufixusu.weebly.com/uploads/1/3/1/4/131453301/7776009.pdfIn PDF document text
    • https://sefubokadizafa.weebly.com/uploads/1/3/4/8/134880044/1833091.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dofomexikokubeb.epizy.com/devepaliwofeg.pdfIn PDF document text
    • http://jipidabaxepej.epizy.com/balanza_romana_informacion.pdfIn PDF document text
    • http://lusiromipu.epizy.com/forifejavavapalana.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_off0000cc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC54 5508 bytes
SHA-256: 2efed79f0bf1ab8843e89a85add394721bb9c11cc01649032a2474040ff32bc8
font_01_sfnt_off0000def0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF0 10468 bytes
SHA-256: a78d02b6f3fba0551cbf45ff7cc952c2762c336956afa2fae54fc6cd0ce169aa

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