PDF malware analysis — malicious · 813a5ffdcd05e30e

MALICIOUS

PDF

75.8 KB Created: 2021-05-26 17:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 9b207fbfa12fad1aaf9626a029556a6a SHA-1: 00c0016ce706e5efb756d1ff78a304bc50516c09 SHA-256: 813a5ffdcd05e30e68354f22ad3ec4ca49654ea8bfc9a4da760b17719432115d

216 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to redirectors or phishing lures, specifically impersonating Amazon. The ClamAV detection and ML classifier also indicate maliciousness. The primary attack pattern observed is credential phishing, facilitated by a link farm strategy within the PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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.
Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH

Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://nemimatavowep.weebly.com/uploads/1/3/4/6/134692492/fufutotiwaw-fabikuba.pdf.
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://baarspo.ru/strik?utm_term=demographic+transition+worksheet+answers PDF link annotation
- https://cdn-cms.f-static.net/uploads/4491169/normal_5fd1fc914b819.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369330/normal_605111b18fec1.pdfIn PDF document text
- https://nemimatavowep.weebly.com/uploads/1/3/4/6/134692492/fufutotiwaw-fabikuba.pdfIn PDF document text
- https://lumevukivejus.weebly.com/uploads/1/3/0/8/130874583/6623611.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4527237/normal_6002423f78531.pdfIn PDF document text
- https://wivoximuvekobug.weebly.com/uploads/1/3/4/4/134473281/nonuvurogilami-livojituwaxis-nevevawa.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4381085/normal_60081d3348166.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4402533/normal_5fded00891caa.pdfIn PDF document text
- https://dakubotamijez.weebly.com/uploads/1/3/2/7/132712147/44f0c90e2.pdfIn PDF document text
- https://nazorokofewedu.weebly.com/uploads/1/3/2/7/132710677/814899c0e34.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4416930/normal_5ff5564f5e75d.pdfIn PDF document text
- https://zurowesijeja.weebly.com/uploads/1/3/4/6/134630916/gozitepugegoxo.pdfIn PDF document text
- https://jipafedi.weebly.com/uploads/1/3/0/8/130813136/sunopefevi.pdfIn PDF document text
- https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/wekabajotixugev_dijol_dobewazizek.pdfIn PDF document text
- https://munefetuwavebif.weebly.com/uploads/1/3/2/6/132683017/ec49a907cd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453129/normal_60438b5facdcb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403806/normal_6044d7e926951.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/4b0eed50-7d01-41d8-accc-2ed5cc49260a/mexitujamuwanepogu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5200d3c3-3c56-437d-9557-04cc7c59dbaa/better_than_before_consignments_cullman_alabama.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d0c81272-d33f-4f2a-a4fa-c70f6d252cad/mhw_guiding_lands_guide_reddit.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_off0000dfd7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDFD7	5472 bytes
SHA-256: `66ca168b87ebb38ca3526121082a40586aa34bbdf2b19e3a7e70fca47d47eeea`
`font_01_sfnt_off0000f257.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF257	1912 bytes
SHA-256: `219c50eb5f9de54547e75882c5791e81fccadeb83f743dbd1d6da3bbbca1c2be`
`font_02_sfnt_off0000fb98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB98	10428 bytes
SHA-256: `a6c8d01ce8626892e07d390dd619e6b2b15702b9b6b8c478a416a1da331e8feb`

Open this report in the interactive analyzer, or submit your own file for analysis.