Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5668bea26453d19…

MALICIOUS

PDF

85.2 KB Created: 2021-06-01 04:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1ad325063a63057760f082cd987886fb SHA-1: fc4551335fe36e41e17bd19c96a92c54b288b309 SHA-256: c5668bea26453d195ca52cb258a2a032abaa8c574271fe0bc24ac382dbd1d1ee
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, indicative of a link farm or SEO spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://irlanc.ru/pbw?utm_term=how+to+properly+use+arc+trainer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460963/normal_5fd8237d9510c.pdfIn PDF document text
    • https://xelewutoritawi.weebly.com/uploads/1/3/1/0/131070131/doxogeg.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4494866/normal_60b103001ccd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_602071b589ad3.pdfIn PDF document text
    • https://jegiwagoxupida.weebly.com/uploads/1/3/1/3/131379361/878cd3aec983.pdfIn PDF document text
    • https://golotarati.weebly.com/uploads/1/3/1/8/131856611/a15789469e0b1a1.pdfIn PDF document text
    • https://fatagijow.weebly.com/uploads/1/3/5/3/135314750/2194286.pdfIn PDF document text
    • https://wafodefa.weebly.com/uploads/1/3/4/4/134480145/didada_wexonibazonepi.pdfIn PDF document text
    • https://kubazabuz.weebly.com/uploads/1/3/4/8/134885093/2168878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444351/normal_600f7636076a5.pdfIn PDF document text
    • https://balikawe.weebly.com/uploads/1/3/4/6/134659528/mexorasanigivo-kemuwovizato-xewubu.pdfIn PDF document text
    • https://vuvonuzomuvi.weebly.com/uploads/1/3/4/5/134508102/2874f7bf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447466/normal_602e1bb14870e.pdfIn PDF document text
    • https://mixutexevegov.weebly.com/uploads/1/3/4/7/134706804/95da8a.pdfIn PDF document text
    • https://tenaxolisus.weebly.com/uploads/1/3/4/6/134654195/92eaa2cdabe6415.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383577/normal_5fcf98da2fe3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370278/normal_5fe0614a65927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421768/normal_6022c037b32f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406771/normal_5ff80417ee9b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xedidovetaw.pbworks.com/w/file/fetch/144412518/54740183798.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/w/file/fetch/144420819/56326735250.pdfIn PDF document text
    • http://lipadune.pbworks.com/f/is_there_an_app_that_can_monitor_blood_pressure.pdfIn PDF document text
    • http://kelivesas.pbworks.com/w/file/fetch/144438621/gre_verbal_practice_questions_with_answers.pdfIn PDF document text
    • http://xalomuzavege.pbworks.com/f/vujuveteresojixu.pdfIn PDF document text
    • http://sepaxebi.pbworks.com/f/30059351831.pdfIn PDF document text
    • http://bovojigu.pbworks.com/w/file/fetch/144418140/15246981713.pdfIn PDF document text
    • http://fodorafirig.pbworks.com/w/file/fetch/144432648/kovetumisanezabunudi.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_off0001104d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104D 5084 bytes
SHA-256: b4ff746f032edb6586ee42faa27968eb20c861fdb4dee133e36174b45c301e2c
font_01_sfnt_off000121bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BC 11116 bytes
SHA-256: d7527b60bc01396048a5e0a179b326459045d36078edf51b9a28703a14409632

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