PDF malware analysis — malicious · 1fb69553495877bb

MALICIOUS

PDF

86.0 KB Created: 2021-05-23 16:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 5122921e90aa1b1860805cbeffbec065 SHA-1: e9b3d71a9da21690f53858d97556e42c688190ab SHA-256: 1fb69553495877bb15eb4205ef73dfc6fed96fdcad9b049f66d150d63aeba2fe

196 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. It uses a password-protected-archive lure. 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 0.9996

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.
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://nipisod.ru/strik?utm_term=castle+crush+hack+mod+apk+download+unlimited+gems PDF link annotation
- https://static.s123-cdn-static.com/uploads/4481272/normal_6007d8465eb2a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4444884/normal_5fcce65c86ffd.pdfIn PDF document text
- https://jajixawu.weebly.com/uploads/1/3/5/9/135992574/a4fc98.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4488572/normal_5ffddff9f2320.pdfIn PDF document text
- https://pafodezeba.weebly.com/uploads/1/3/4/5/134589846/dezofamezorit-totolulibono-xibebeno-fofawam.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4423752/normal_602b23a2a1275.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4408483/normal_5fdeb07a7ebb3.pdfIn PDF document text
- https://lobududovidaxu.weebly.com/uploads/1/3/3/9/133997350/pewisosex.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481515/normal_600074ad6a972.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4470385/normal_5fffc77e10d69.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4447084/normal_6057d147b67d1.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/7f84d0de-6f52-4618-b626-ee0af008af27/nj_transit_fare_enforcement.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4f6f0664-046e-47ec-a60c-abafa1afbf3b/how_to_use_kindle_app_on_pc.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/25d4e8c7-692b-4d73-832d-e7addb7abac8/17240604344.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d2740762-3f71-481f-9f59-18975b667782/xuwil.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5e13ad8f-b01b-4d59-9ce7-b078b210d7e9/40855321295.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/97024502-1a9d-40f1-bbc4-e38953271c0d/best_argument_against_vegetarianism.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c6d8a444-5ce1-4440-9361-ef23e377b1db/how_to_make_turkey_with_handprint.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/928881c2-1ffa-4e72-ac1b-0298aecc8729/which_printer_is_best_for_sublimation.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ea20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA20	5548 bytes
SHA-256: `921132638964a3c74d58d4af7d03b50d8ca449fa5da62d347448b8487d3c1247`
`font_01_sfnt_off0000fcd4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCD4	2116 bytes
SHA-256: `8db65adc699bed2ed4e99b174e414cace916d9ae25f4e5597e3d94de4d1667c8`
`font_02_sfnt_off0001067c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1067C	11596 bytes
SHA-256: `cc033dc355f042f4d239cb122fb153ba06c18bf4f2856ef004838c25654e7c81`
`font_03_sfnt_off00012e6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E6C	17392 bytes
SHA-256: `a67fd5e1aff6e463b68d3eba8badb247092367b92cc15114c78d209e0d7d4e23`

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