PDF malware analysis — malicious · e4840dc962b8b860

MALICIOUS

PDF

87.8 KB Created: 2021-03-22 08:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: a285bc447cdc82d57349494fd54eaa1b SHA-1: aeae46777b5b8752abc9907d6587008e47c1c941 SHA-256: e4840dc962b8b86089551a0932a746ecddaaba5f56af6aab9bcd7099bb29fbeb

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. The document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic. One of the extracted URLs, 'https://fokemale.ru/123?utm_term=buttercups+uniforms+discount+code', appears to be a lure for potential victims.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

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://fokemale.ru/123?utm_term=buttercups+uniforms+discount+code PDF link annotation
- https://cdn-cms.f-static.net/uploads/4408330/normal_60183498ec174.pdfIn PDF document text
- https://degugelusejife.weebly.com/uploads/1/3/2/6/132695568/vizimumodapemek_lepowiwuvoripok.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4401697/normal_6038be1569e22.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4373517/normal_60435a49d7ff5.pdfIn PDF document text
- https://texosubos.weebly.com/uploads/1/3/4/7/134715033/4563187.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4385421/normal_601996fb390a1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451766/normal_60141355a0020.pdfIn PDF document text
- https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/bitutipapo_wasudefedenuvit_xilobotexazex_buvugusegonomu.pdfIn PDF document text
- http://copyrightsupporteds.com/salary_of_aircraft_maintenance_engineer_in_air_indiacjbhb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4382620/normal_5fc658b9013f6.pdfIn PDF document text
- http://particuliers-societegenerale.xyz/puvawitezivalatebiyvt.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4479236/normal_5fc7bbae27977.pdfIn PDF document text
- https://waxovidimised.weebly.com/uploads/1/3/4/4/134446407/dakefifunasamubewata.pdfIn PDF document text
- https://paludiwebi.weebly.com/uploads/1/3/4/0/134012690/056634792540.pdfIn PDF document text
- https://rolorizumi.weebly.com/uploads/1/3/4/3/134316308/maxug.pdfIn PDF document text
- http://nibelv.xyz/logo_quiz_answers_level_2_logo_38qmzhu.pdfIn PDF document text
- https://fusufuxono.weebly.com/uploads/1/3/1/6/131606103/sogidabedib-nonetoz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379379/normal_6029cdf121865.pdfIn PDF document text
- https://jebupamix.weebly.com/uploads/1/3/6/0/136098333/6239531.pdfIn PDF document text
- https://xeninudi.weebly.com/uploads/1/3/3/9/133997188/rotuloxe.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_d9fc726aed8f47d68eac947970fd5ca3.pdf?index=trueIn PDF document text
- https://507f79ed-2408-4027-b124-45ed49bded7d.filesusr.com/ugd/2de61b_fdbea8b2ab9841bfbf39d360437f265d.pdf?index=trueIn PDF document text
- https://36d3fe4d-ce77-4ecd-ae21-04b42370c250.filesusr.com/ugd/871c54_83935dd275204cf9b4d7f4cb220210a3.pdf?index=trueIn PDF document text
- https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_359363d458974011bb6d49aa99494a8b.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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
`stream_004_off000125c1.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x125C1	23496 bytes
SHA-256: `d95ed575977c310bc0507b15459fc45ed4319f58fdefcd810403c0657bbe482d`
`font_00_sfnt_off0000ed70.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED70	5108 bytes
SHA-256: `434fc67aa879a168ec20ea22ed1b908ce1a93a1076d560387347bf73c13fd938`
`font_01_sfnt_off0000febe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEBE	11332 bytes
SHA-256: `0fdd065e1e56ac1345b4dd34a68124f5f10a54364e47486064b242d9b5c69e8f`

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