PDF malware analysis — malicious · 9abca3f8da491f56

MALICIOUS

PDF

80.9 KB Created: 2020-12-26 08:37:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: b41d67f51d5eb0da6d82b885b609f219 SHA-1: d1590d70058cc259e338453963ff800f647e0e11 SHA-256: 9abca3f8da491f565cfb40e64eca3419b19afcf8f479564ec81e9bd552947f40

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one pointing to a suspicious URL ('trafftec.ru'). The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or SEO poisoning attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9090

Heuristics 5

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.
External URI info PDF_URI

PDF contains an external URL action
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://trafftec.ru/strik?utm_term=cat+warner+famous+birthdays PDF link annotation
- https://cdn-cms.f-static.net/uploads/4448733/normal_5fa0db5d2ba56.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389106/normal_5fa540e46f069.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370059/normal_5f8dda21d4042.pdfIn PDF document text
- https://wetejitaxazis.weebly.com/uploads/1/3/4/3/134306742/a716d79fcc5.pdfIn PDF document text
- https://topizamo.weebly.com/uploads/1/3/4/4/134435864/9550457.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/rivazixexuguri/mv_twice_fancy_dance_practice.pdfIn PDF document text
- https://s3.amazonaws.com/lunojol/ctet_solved_question_paper_2018_download.pdfIn PDF document text
- https://s3.amazonaws.com/kuboki/assured_shorthold_tenancy_deposit_prescribed_information.pdfIn PDF document text
- https://s3.amazonaws.com/fuwenoxuzasila/48448764844.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c468f437-1861-49c1-9451-7d24ed939dde/bexaja.pdfIn PDF document text
- https://s3.amazonaws.com/firudegix/varokemijubezewudonam.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d3da747b-eaae-4a5a-b0ac-5b5ad78fc977/3783784190.pdfIn 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_off00010abd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10ABD	5352 bytes
SHA-256: `acee4b5c559d59ddfe3ff119d7c613c6bd9401d8a2db73f1e7363bba2b4c7066`
`font_01_sfnt_off00011cd8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11CD8	11328 bytes
SHA-256: `94de857e414447dc55fcb4ddb84e089f2c5bc7ac125077f2be1eccfd2fd53c43`

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