PDF malware analysis — malicious · db197665e6efdeec

MALICIOUS

PDF

79.3 KB Created: 2021-03-08 02:51:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: f8c157f5ebad4e9cd468dab2dc5f4037 SHA-1: 1990ec97b23f14a627e68e6c5b6feb2f90c93804 SHA-256: db197665e6efdeeca869e5ed510680b0a3de328bffa2e3d20be11f40993067c6

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. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. One of the embedded URLs, https://kuzutuzo.ru/wix?keyword=ace+quiz+bowl+study+guides, is likely part of this scheme to drive traffic to malicious sites.

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://kuzutuzo.ru/wix?keyword=ace+quiz+bowl+study+guides PDF link annotation
- https://danupinizagene.weebly.com/uploads/1/3/1/4/131483344/merajopijar-butibisevojub-sorojel-vojufel.pdfIn PDF document text
- https://gipofomodofomew.weebly.com/uploads/1/3/2/3/132303323/gumajafego-nigoxifowaje.pdfIn PDF document text
- https://jixawapideraje.weebly.com/uploads/1/3/3/9/133997308/876cbbb427010.pdfIn PDF document text
- https://bogezozoxo.weebly.com/uploads/1/3/4/4/134479702/putadoxojitibutonawa.pdfIn PDF document text
- https://puxugewukuniw.weebly.com/uploads/1/3/4/4/134492634/9144954.pdfIn PDF document text
- https://topigofifudonif.weebly.com/uploads/1/3/5/3/135304546/1661372.pdfIn PDF document text
- https://fidimamafiw.weebly.com/uploads/1/3/4/6/134624465/6486482.pdfIn PDF document text
- https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/2851191.pdfIn PDF document text
- https://zegekeli.weebly.com/uploads/1/3/4/6/134616407/wikexajebijagumoz.pdfIn PDF document text
- https://jasumiwadujavik.weebly.com/uploads/1/3/2/7/132741590/a67315cde70ca.pdfIn PDF document text
- https://sowibize.weebly.com/uploads/1/3/5/3/135348762/zamurado.pdfIn PDF document text
- https://xepevuke.weebly.com/uploads/1/3/0/7/130775471/mufukovetivuz.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://s3.amazonaws.com/legesiliv/nizamipemevojigodepo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1cd807ef-7da6-44d1-954e-13b3720b1e03/how_to_take_the_best_photos_with_nikon_d3400.pdfIn PDF document text
- https://s3.amazonaws.com/rovikibixu/zumetiwifu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/32c9e80e-ddee-4ad3-afb1-ff4564311afc/jibaluxubemobewubiroruxa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/44ee6570-acb5-401d-a09e-91160f970b1c/gobizeninala.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f08b1c1c-7c53-4322-931c-bfc72619d1bc/lixosobukakefasulugava.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7c818565-3b17-4531-8b7e-de5cf54711d9/how_to_make_a_reflection_paper_example.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_off0000ec8f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC8F	5076 bytes
SHA-256: `597cc29aa63974c61272b08c6410c6e87df3f6dfab2091c579f8aee87f516f37`
`font_01_sfnt_off0000fdf0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDF0	10608 bytes
SHA-256: `73a2fc565c176f2306c90c4b867d4b746ee6dea3ddc6526f35b368740c50e9b7`
`font_02_sfnt_off00012234.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12234	4324 bytes
SHA-256: `7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71`

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