PDF malware analysis — malicious · 37c7dad3889b1e14

MALICIOUS

PDF

79.4 KB Created: 2021-05-24 17:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 84f793824c6c840c8244533f2e6cbdae SHA-1: df10ae1281ade141854638cf91dbab3ad26f0314 SHA-256: 37c7dad3889b1e148c2ff9dbe163a7897f5e1a538adb391563295cb52234f13d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains a large number of external links, with one prominent URL pointing to 'jottigo.ru', suggesting a phishing or link-farming scheme. The PDF structure and embedded content indicate it's designed to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

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.
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://jottigo.ru/strik?utm_term=libro+para+aprender+ingles+basico+pdf PDF link annotation
- https://pabelazulutibus.weebly.com/uploads/1/3/1/0/131070827/7710956.pdfIn PDF document text
- https://sulipebi.weebly.com/uploads/1/3/0/7/130739254/3954119.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4489988/normal_5fc6ce96565c0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366632/normal_601d9bb91b7d0.pdfIn PDF document text
- https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/fac5f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4445334/normal_6030642289521.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4491433/normal_5fcf880800ea1.pdfIn PDF document text
- https://bipixexomalexu.weebly.com/uploads/1/3/4/3/134349320/moxunaliragab.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/votuweroxigezog/cost_sheet_excel_format_free.pdfIn PDF document text
- https://s3.amazonaws.com/suzujewa/supreme_court_cases_apush_period_4.pdfIn PDF document text
- https://s3.amazonaws.com/tuxutedi/honda_hs928_snow_blower_parts.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0f6ff664-da4e-495c-80b3-b42b62c1ec99/depad.pdfIn PDF document text
- https://s3.amazonaws.com/telasebisu/factory_reset_apk.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dc11bac2-006d-43c3-9838-3e9b91f02fe2/penovedakuvojevuwupovu.pdfIn PDF document text
- https://s3.amazonaws.com/jizubisetebof/ardhanari_full_movie_in_telugu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/65719adb-2a1f-4af5-8a2a-234b5f9d4d02/35935244839.pdfIn PDF document text
- https://s3.amazonaws.com/voropa/zizajivavofamevevevate.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aa7c4393-4ffb-4cff-8f82-358c4644f9b4/sijidukuzikimemutojurige.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2d0c1f1f-8be9-4c65-b14a-cdd312a6b06d/pavagesiguziw.pdfIn PDF document text
- https://s3.amazonaws.com/mipeboro/9842071351.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_off0000e758.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE758	5112 bytes
SHA-256: `4e768e3a7aa74e7cee4666d3ca34bcbcb3282f8423159723012a17baa5f6c817`
`font_01_sfnt_off0000f8b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8B3	12340 bytes
SHA-256: `3e45a087f45a1b811424fdee8a3cc26223cc0d563603003a1f3e63cd273cb6cf`
`font_02_sfnt_off0001209d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1209D	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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