PDF malware analysis — malicious · eca99b75a303f8e1

MALICIOUS

PDF

78.1 KB Created: 2021-04-29 23:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: e28f42da5793b040f26979e8630f1a6d SHA-1: 7c29f70d73f5fcfa72365e4e557f8d9bd35cbb02 SHA-256: eca99b75a303f8e15892f1f3187916b16bf545ac8f7f2a004af90f995e0ad9ca

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users. ClamAV detection and ML classification further support its malicious nature, flagging it as a phishing trojan. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malicious redirection attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9957

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://leonvi.ru/strik?utm_term=wolf+of+wall+street+actor+salaries PDF link annotation
- https://cdn.sqhk.co/gisepavuv/mtHV2jh/jivuboxomeguki.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4460706/normal_5fcad0f1bb7c7.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4374860/normal_5fe2b55b5dafa.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4412599/normal_5fe0273202297.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377663/normal_604cf1c74e6e9.pdfIn PDF document text
- https://cdn.sqhk.co/rugugojeba/gha5hIM/snapping_turtle_bite_force.pdfIn PDF document text
- https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/6581152.pdfIn PDF document text
- https://dilipifoson.weebly.com/uploads/1/3/1/0/131070096/wisolisikap.pdfIn PDF document text
- https://sozezitevi.weebly.com/uploads/1/3/4/6/134639304/f03bcc18746.pdfIn PDF document text
- http://kovuzaxaf.medianewsonline.com/piping_designer_interview_questions_and_answers_download.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4501789/normal_6003a843b56fd.pdfIn PDF document text
- https://gibolavisijubaz.weebly.com/uploads/1/3/0/8/130813033/2020932.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450037/normal_6065a9194ab86.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4501495/normal_5fefd3e5634e2.pdfIn PDF document text
- https://cdn.sqhk.co/josozudibud/Herjfji/33997851436.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4368478/normal_5fee6a868a25e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470825/normal_60641de8d7dbb.pdfIn PDF document text
- https://cdn.sqhk.co/wemerofada/jbih2gc/zigzagoon_shiny_hunt.pdfIn PDF document text
- http://gojawufeki.getenjoyment.net/dilosuzekexivifu.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/c6f1dca1-c248-4abd-bba9-06938f2b9432/best_pvp_weapons_dark_souls_3.pdfIn PDF document text
- http://nujilexulajuwup.atwebpages.com/belajar_gitar_pemula.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1e60866d-eb6a-452b-9ec4-9340d80890ad/52040337880.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ee6e9652-2f6b-4b24-9000-83cbe0c931da/73601645815.pdfIn PDF document text
- http://ligoroxenafof.atwebpages.com/n2_3h2_2nh3_redox_reaction.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/86f9a8df-cef2-40d8-9e0c-98b3a053ac81/58590908034.pdfIn PDF document text
- http://xipanizi.myartsonline.com/how_to_watch_two_twitch_streams_at_once.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/30bbb07c-74cd-4d18-bd52-763a88d25350/11746802122.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_off0000f42b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF42B	4980 bytes
SHA-256: `b6f70d5116a40ce173aa272a26688fee093558ecffd9a4bce29cd3b1a17e1b43`
`font_01_sfnt_off00010546.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10546	10728 bytes
SHA-256: `6b867c73a201ac36a929ef349527cd45d41dc863d02c56ed9176e8e4299d84af`

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