PDF malware analysis — malicious · d6067512f859c2eb

MALICIOUS

PDF

77.3 KB Created: 2021-02-16 18:11:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 3c82c787c94848f7883b05e0a7e6060e SHA-1: b2185296470e594cc36e109c0c8f10190d14c916 SHA-256: d6067512f859c2ebbce7064c410ac18a214b7a4b426e7886f33f2decf3f2877e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to PDF files on various domains, suggesting a link farm or SEO poisoning tactic. One embedded URI, 'https://seumenha.ru/wix?keyword=cotton+fields+song+lyrics', appears to be a lure to disguise the malicious nature of the document. The presence of numerous external links and the overall structure strongly suggest this PDF is designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

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.
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://seumenha.ru/wix?keyword=cotton+fields+song+lyrics PDF link annotation
- http://samyog.ru/11056760491kkhkg.pdfIn PDF document text
- https://fuwiwidiwijidex.weebly.com/uploads/1/3/1/6/131637339/3898494.pdfIn PDF document text
- https://xazonidunigi.weebly.com/uploads/1/3/4/5/134590253/gevifitiguvovuxanud.pdfIn PDF document text
- https://jajufuwupu.weebly.com/uploads/1/3/1/1/131163717/990525.pdfIn PDF document text
- https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/2b500c6de646.pdfIn PDF document text
- https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/49b62648c3a0f8.pdfIn PDF document text
- https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/mofove-tugaxazudapunol-vaxerojakulogo-dunotarokele.pdfIn PDF document text
- https://sejesomizibiji.weebly.com/uploads/1/3/5/3/135346687/butabagisote-fosuniju-fepina.pdfIn PDF document text
- https://bopunesarikimar.weebly.com/uploads/1/3/1/4/131453984/zixovopuxora-xelusoliwe.pdfIn PDF document text
- https://mojavopadagesit.weebly.com/uploads/1/3/5/3/135383036/5896125.pdfIn PDF document text
- https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/a133c5ddd.pdfIn PDF document text
- http://jadebey-x.com/wiring_diagram_for_crossover_ethernet_cablew0nro.pdfIn PDF document text
- https://faxezufag.weebly.com/uploads/1/3/0/8/130874059/wopejurew.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/bufexa/wutelemudal.pdfIn PDF document text
- https://s3.amazonaws.com/tobaziw/fomoxenewe.pdfIn PDF document text
- https://s3.amazonaws.com/liguwubore/fire_emblem_heroes_lunatic_guide.pdfIn PDF document text
- https://s3.amazonaws.com/gelawiweza/cj_logistics_corporation_annual_report_2017.pdfIn PDF document text
- https://s3.amazonaws.com/fupanabivote/lenovo_miix_520_spec_sheet.pdfIn PDF document text
- https://s3.amazonaws.com/gafedupeba/veseduxi.pdfIn PDF document text
- https://s3.amazonaws.com/davolazupivowi/triangle_test_sensory_evaluation.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f341.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF341	4984 bytes
SHA-256: `b5318ab87a51d9245c176d2c67dee19b017969eb6ff1b7fa4e83088b2d3c7e86`
`font_01_sfnt_off00010451.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10451	10428 bytes
SHA-256: `8adcd402009c6f1e4bb86f2b0b13677d4b55cca702ba5ea174ec9ad885df603a`

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