PDF malware analysis — malicious · 1e58be99a5337dc8

MALICIOUS

PDF

84.0 KB Created: 2021-03-11 06:11:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 42ace22cf21d5a9f384bc08dfd2c4930 SHA-1: 1bacdb095f023022036f6c0e21583ed9ae0f2c0d SHA-256: 1e58be99a5337dc8ab3b28e6a1d95b1301b11fe02e514a633330369ca99b7f57

246 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF file exhibits characteristics of a credential phishing campaign, specifically impersonating the Disney brand. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to obscure the ultimate destination. The primary malicious URL identified is https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/zerafa.pdf, which is part of a redirection chain leading to the phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

Heuristics 7

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.
Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/zerafa.pdf.
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://botokaw.ru/award?keyword=catalogo+sandvik+fresado+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4474471/normal_600c727472204.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489586/normal_6013bb1a0cda0.pdfIn PDF document text
- https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/zerafa.pdfIn PDF document text
- https://bajurajatug.weebly.com/uploads/1/3/6/0/136054821/8157470.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460963/normal_6041777f821b0.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4456998/normal_5ffc4707d68b3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385012/normal_60446bbeb304e.pdfIn PDF document text
- https://dutajedi.weebly.com/uploads/1/3/5/9/135964159/repazibiz.pdfIn PDF document text
- http://sagedix.medianewsonline.com/canadas_national_sport_word_craze.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381528/normal_60491d2961097.pdfIn PDF document text
- http://lenuvivureropi.scienceontheweb.net/95239586921.pdfIn PDF document text
- http://nezowigivomi.scienceontheweb.net/wings_of_fire_dragonslayer_book_depository.pdfIn PDF document text
- https://biwoponafi.weebly.com/uploads/1/3/4/7/134767969/1810567.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4368224/normal_5fdea07d3b342.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418583/normal_5fe72ed72afd0.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4451365/normal_5ff38c9a5e6b1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449614/normal_602fd9a04973a.pdfIn PDF document text
- https://podozipejubepa.weebly.com/uploads/1/3/4/8/134893890/8510242.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368486/normal_5fd733da67cb9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375086/normal_5fe7577ec89e4.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://bufijonewufo.onlinewebshop.net/introduction_nlp.pdfIn PDF document text
- http://xuvuzonixo.onlinewebshop.net/edit_file_free_software.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000faef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAEF	4084 bytes
SHA-256: `89198bb568c9c7e1e275edd7dd75c3a7d56a466a61ec6af10310ec80ae5f39e9`
`font_01_sfnt_off0001095b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1095B	5236 bytes
SHA-256: `7879242773c121676e4223420fd67638e65a221ce225890f7c6d6265f139da54`
`font_02_sfnt_off00011b46.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B46	11504 bytes
SHA-256: `4d61cf2ade747a669696f72efd11005f578ef594703e4e4bb7bf29b83d11264c`

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