PDF malware analysis — malicious · 5f3e35c1f921af2b

MALICIOUS

PDF

73.0 KB Created: 2020-11-11 19:45:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04

MD5: afff60b746f87b2907ae068cde0f3618 SHA-1: 2dafaf5956ffc16aa1d32b2190810734e6dab534 SHA-256: 5f3e35c1f921af2bee3addbc122b1cb4a0576079f3bdda4affe09d7a3403cec4

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

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.
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://traffine.ru/123?utm_term=riverside+hospital+columbus PDF link annotation
- https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/gugar-zetuxasawep.pdfIn PDF document text
- https://gusabowusido.weebly.com/uploads/1/3/4/6/134652741/lilaf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418557/normal_5f9723c4cc582.pdfIn PDF document text
- https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/4897235.pdfIn PDF document text
- https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/6f0a2c.pdfIn PDF document text
- https://bitifuzafaf.weebly.com/uploads/1/3/4/4/134488734/2659458.pdfIn PDF document text
- https://zevamomarage.weebly.com/uploads/1/3/4/6/134611313/839c0.pdfIn PDF document text
- https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/3222a74.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/nitajosasa/quick_fire_pool_online_free.pdfIn PDF document text
- https://s3.amazonaws.com/fokapikow/ganapati_atharvashirsha_in_kannada.pdfIn PDF document text
- https://s3.amazonaws.com/fajixe/vepedigexajebitofup.pdfIn PDF document text
- https://s3.amazonaws.com/mamukawaxatali/weider_home_gym_model_8530_manual.pdfIn PDF document text
- https://s3.amazonaws.com/ditiruz/critical_thinking_an_extended_definition.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/df3dd993-77ce-4011-845c-48a04fc51333/zoxeti.pdfIn PDF document text
- https://s3.amazonaws.com/bejeseja/pyramid_wireless_power_plant.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b11222ec-838c-4380-b3ac-f54be4fb7ee2/60264820630.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_off0000e066.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE066	5520 bytes
SHA-256: `c7beafd257a1a364c375e925f8ea509d6f48fcaab871770a5cbc7c72ed9b6c0b`
`font_01_sfnt_off0000f2ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2FF	10968 bytes
SHA-256: `8f51fdfc4173fe2fa8310d7a5be06ec6fc891415f4319d8bde80ab794bd54607`

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