PDF malware analysis — malicious · 4d1c47311a9b38dd

MALICIOUS

PDF

71.7 KB Created: 2021-06-02 19:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 51e902f8127ff24751fb01023100ea59 SHA-1: 3ca0184c5d0a7536210b6be27711d4f5c2b1514d SHA-256: 4d1c47311a9b38dd6bccd54bb539e52feb0fe5eb199ec343f9038eb427961aaf

186 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. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm. The embedded URLs and the document's structure point towards a phishing or malware distribution scheme, likely initiated via spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://golowaki.ru/123?utm_term=harare+weather+report+week PDF link annotation
- https://mejotozoferu.weebly.com/uploads/1/3/4/8/134866749/lupesutaf.pdfIn PDF document text
- https://sekonumewazu.weebly.com/uploads/1/3/4/1/134131339/6de1eb9b.pdfIn PDF document text
- https://xexonuza.weebly.com/uploads/1/3/4/3/134305788/132a91f628.pdfIn PDF document text
- https://lakaporizad.weebly.com/uploads/1/3/4/2/134234628/d1970d70.pdfIn PDF document text
- https://buxefakoxu.weebly.com/uploads/1/3/4/7/134744428/zapevujifitebubowi.pdfIn PDF document text
- https://gewuzonaxos.weebly.com/uploads/1/3/4/7/134714103/luzaf-tuluvuxut-vopelixupapimol.pdfIn PDF document text
- https://mijezuri.weebly.com/uploads/1/3/0/9/130969422/4800861.pdfIn PDF document text
- https://purigimotefejis.weebly.com/uploads/1/3/4/3/134308192/5b8e2e8c0b.pdfIn PDF document text
- https://fometixivoros.weebly.com/uploads/1/3/1/6/131637143/1856822.pdfIn PDF document text
- https://lekomitigukajar.weebly.com/uploads/1/3/5/3/135345412/dinumojizof.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/a3b08038-a1c9-4181-8906-01c5a246266a/figurative_language_powerpoint_slideshare.pdfIn PDF document text
- http://damopijos.pbworks.com/w/file/fetch/144499710/93932619459.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/eb1fbe78-4823-48c5-943b-fb9cdaf107d2/what_is_a_calzone_vs_panzerotti.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/eaeb912c-26c6-4076-8e54-5dc953a6106e/nobagekubaxob.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/34a5ed09-3b84-4605-b2f8-eacbea0b411f/legal_terminology_101.pdfIn PDF document text
- http://ziduzobif.pbworks.com/f/what_can_i_eat_on_keto_printable_list.pdfIn PDF document text
- http://masawumel.pbworks.com/f/zawejofun.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a658f85b-cece-4556-9c12-22dea56b69f1/23074506339.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cf5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF5B	4448 bytes
SHA-256: `831390f9dd1c1e7a5cc51838a381b200bdbede78e3439282c8f44ffa2160a5de`
`font_01_sfnt_off0000de93.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE93	10360 bytes
SHA-256: `8b55ad491d6701dc5dcb9fec7308d0e7dd6540be90bb62478084603665c206a9`
`font_02_sfnt_off00010244.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10244	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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