PDF malware analysis — malicious · 4225e077e5cd1394

MALICIOUS

PDF

58.3 KB Created: 2020-11-22 06:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2f4dd153a9342e3db9b74fe7bd625f00 SHA-1: 5bf969919a5c4dec285add60df5085ea49b4f475 SHA-256: 4225e077e5cd13941bd9941b0fbfe73710eb8845a7ab3de3fc28040f4c0506b9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

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.
ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://trafffe.ru/123?utm_term=paul+simon+ukulele+chords
- https://cdn-cms.f-static.net/uploads/4453098/normal_5fa0c355ce07a.pdf
- https://rofofomigedug.weebly.com/uploads/1/3/4/4/134486696/207482.pdf
- https://cdn-cms.f-static.net/uploads/4454303/normal_5fa4f1809e8ec.pdf
- https://mesedegusi.weebly.com/uploads/1/3/4/6/134600151/2b71212d336bab.pdf
- https://cdn-cms.f-static.net/uploads/4392862/normal_5fb2c123a06df.pdf
- https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdf
- https://cdn-cms.f-static.net/uploads/4381738/normal_5f973769d4054.pdf
- https://cdn-cms.f-static.net/uploads/4469641/normal_5fa783bb98d07.pdf
- https://cdn-cms.f-static.net/uploads/4375210/normal_5f9785101aad8.pdf
- https://cdn-cms.f-static.net/uploads/4451574/normal_5fb5b80de2537.pdf
- https://cdn-cms.f-static.net/uploads/4452595/normal_5fa168b983654.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/kikunojulejuj/3873592557.pdf
- https://s3.amazonaws.com/temujonuwu/14086673109.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000aa6f.bin` `91ddff020148011444114e59c26c7d4dd6f12bdc5058263b3174c8a0561c872b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAA6F	5244 bytes
`font_01_sfnt_off0000bc18.bin` `0b5d462b33f4806ac06f754221796e41bea7d6ad87e78a94fe622b1a972b7422`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBC18	9564 bytes

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