PDF malware analysis — malicious · 302338c619197b52

MALICIOUS

PDF

82.5 KB Created: 2021-04-03 19:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20

MD5: 0055fb2e54b64a31082787e228314f54 SHA-1: 9f47a4e41ef4b7b4527dd48be264945bc2eee7ba SHA-256: 302338c619197b5288a9fd2c892fd977b06918a05216099c2169d3e0b0bc479a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous external links, with one pointing to 'seumenha.ru', suggesting a phishing or scam attempt to trick users into downloading software. No scripts were extracted, but the presence of external links and the nature of the heuristics point towards a malicious document designed for user deception.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=java+jdk+6+free PDF link annotation
- https://guxumexowe.weebly.com/uploads/1/3/3/9/133999944/guwadiro.pdfIn PDF document text
- https://sopunarexij.weebly.com/uploads/1/3/1/8/131857112/711324.pdfIn PDF document text
- https://fetubuka.weebly.com/uploads/1/3/1/3/131379928/gojasem_lekizuwitidulu_bebiti.pdfIn PDF document text
- https://ruwaderuxelelu.weebly.com/uploads/1/3/4/6/134651282/cd165e2f.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_237e19901db24633a0d7e27cf9beb728.pdf?index=trueIn PDF document text
- https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_462d65d069a84a3fa689447336669762.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/vidadaviwal/evil_dead_4_movie_in_tamil.pdfIn PDF document text
- https://s3.amazonaws.com/fujadabez/70766277807.pdfIn PDF document text
- https://s3.amazonaws.com/xesigeze/bupapo.pdfIn PDF document text
- https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_e10c4ed357bb43609ef6df640203c561.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/0f410a36-ed55-442b-871c-141829989289/how_to_replace_a_fios_battery.pdfIn PDF document text
- https://s3.amazonaws.com/tipikaxe/chronometer_android_setbase.pdfIn PDF document text
- https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_ab45620e1ae340f29de1214bbb22934d.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/xuvamuba/piwesuwuliwafibusoviwuse.pdfIn PDF document text
- https://s3.amazonaws.com/lezopobigeza/gebidojibopu.pdfIn PDF document text
- https://s3.amazonaws.com/vedexajawo/soxofuponojebufuti.pdfIn PDF document text
- https://s3.amazonaws.com/jepinebawo/what_is_the_device_used_for_morse_code.pdfIn PDF document text
- https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_2cab4338ac034d8faa7b6d41d3861610.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/eb848e34-f34b-4024-a4dc-d2a66b99744e/22456836544.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e80c4e94-77bd-42ed-b6f6-73b97b96f2d8/sonic_menu_lunch_specials.pdfIn PDF document text
- https://s3.amazonaws.com/vabemavuputenif/identifying_verbs_worksheet_grade_1.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f0d8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0D8	5036 bytes
SHA-256: `6e8d806fcf37a4e10c7f95f22f628c378b27673fedc8277dd3aee20b5b0cae6d`
`font_01_sfnt_off00010221.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10221	10716 bytes
SHA-256: `eb0ed7c12102af70b4b549e5e5e87a7ea5c1a558a660031fa8ed559f139654d2`
`font_02_sfnt_off000126ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126EE	16232 bytes
SHA-256: `2eb0db8391d52a8c77f5df56b316fa4d4572011d8c75f79ff2ae509ee43fc5fe`

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