PDF malware analysis — malicious · edcc39df32a06e8b

MALICIOUS

PDF

78.8 KB Created: 2021-02-25 17:18:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14

MD5: ec30bc2aed8280bd3965665b1f97f9a1 SHA-1: 679ecc2b3ce94d1db368ce90a8a672ea5bb0249b SHA-256: edcc39df32a06e8bcafcd4523d9b86f17c506217bb4bbf179852f89b7a1b2c04

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The 'SE_INVOICE_LURE' heuristic indicates the document's content is designed to trick users into clicking these links, likely for malicious purposes. While no scripts were explicitly extracted, the PDF structure and the high ML score suggest it's designed to exploit vulnerabilities or redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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.
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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://druttle.ru/award?keyword=how+many+octaves+is+the+average+vocal+range PDF link annotation
- https://wesotapaxo.weebly.com/uploads/1/3/4/4/134488604/4778695.pdfIn PDF document text
- https://cdn.sqhk.co/divoxisig/ifKjgi3/1182228620.pdfIn PDF document text
- https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/wibef.pdfIn PDF document text
- https://nizevamil.weebly.com/uploads/1/3/2/8/132814567/lerilok.pdfIn PDF document text
- https://vubopedu.weebly.com/uploads/1/3/6/0/136083963/wezut.pdfIn PDF document text
- https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/ea60852a50.pdfIn PDF document text
- http://bururofag.iblogger.org/77834048138.pdfIn PDF document text
- https://cdn.sqhk.co/teforoke/bgfy7hj/74274293434.pdfIn PDF document text
- https://xugoxokolo.weebly.com/uploads/1/3/5/3/135392162/zujugusasovijonobaro.pdfIn PDF document text
- https://nilukosezaxed.weebly.com/uploads/1/3/0/8/130814529/xexodal_muxarobaba_vavupemusidepa.pdfIn PDF document text
- https://cdn.sqhk.co/wupetutigo/LvY1ihz/13241589869.pdfIn PDF document text
- https://zobanegasub.weebly.com/uploads/1/3/1/1/131164549/de17d4ab2dc.pdfIn PDF document text
- https://zunarorukozem.weebly.com/uploads/1/3/4/0/134016655/8390978.pdfIn PDF document text
- https://rilulukopidu.weebly.com/uploads/1/3/5/3/135323077/bazobufizive.pdfIn PDF document text
- https://dunokosira.weebly.com/uploads/1/3/5/3/135349308/728750.pdfIn PDF document text
- http://gobomegom.22web.org/willy_wonka_and_the_chocolate_factory_oompa_loompa_dance.pdfIn PDF document text
- https://cdn.sqhk.co/tedigedubemi/iiLb16d/35338497376.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://zawuzujuw.epizy.com/13586195941.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_off0000ebf5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBF5	5216 bytes
SHA-256: `c5a744c9759ecfa27343ef77fdbb4569b8a34b0dceeb32349f0c8cdb78e94835`
`font_01_sfnt_off0000fd90.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD90	10028 bytes
SHA-256: `361afefd0ca999ec102ea9a6aa6fd7f518f24f0a4f04621468c2a22af21de934`
`font_02_sfnt_off00011ff8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FF8	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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