PDF malware analysis — malicious · aaa188f884e45958

MALICIOUS

PDF

83.9 KB Created: 2021-02-22 07:13:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: 93b94f1ae218d0c4f25d3e5e6c677d68 SHA-1: 38197c49f690c79c929ce9bbdb8f5b3c2f14f17b SHA-256: aaa188f884e4595878529c8ed7631c0e7582da120dceda8abbb69560769b8271

186 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, many hosted on disposable domains or link farms, suggesting a phishing or SEO manipulation scheme. The embedded URLs and the nature of the heuristics indicate an attempt to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/123?utm_term=7+rings+song+lyrics+meaning+in+hindi PDF link annotation
- https://cdn.sqhk.co/jotoselu/WhbJ6id/roman_war_3d_rts_units.pdfIn PDF document text
- https://jusodizepo.weebly.com/uploads/1/3/1/0/131070216/gurivoviga_xilizo.pdfIn PDF document text
- https://cdn.sqhk.co/gepeduvo/fgdhfhe/homeopathic_first_aid_kit_definition.pdfIn PDF document text
- http://kkkirrreeee.space/college_algebra_sample_questionsdxtgh.pdfIn PDF document text
- https://junezafebu.weebly.com/uploads/1/3/0/8/130874287/6991078.pdfIn PDF document text
- https://wugumelejemumaj.weebly.com/uploads/1/3/5/3/135324079/rabogat_zisulamezijaka.pdfIn PDF document text
- https://bonawuxuje.weebly.com/uploads/1/3/0/7/130776103/1515068.pdfIn PDF document text
- https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/1704407.pdfIn PDF document text
- https://cdn.sqhk.co/tiviluluje/igYichg/zuwowozaweladol.pdfIn PDF document text
- https://cdn.sqhk.co/bopibege/9ijfhc3/talisman_meaning_in_tamil_language.pdfIn PDF document text
- http://safagiko.iblogger.org/python_pandas_basic_commands.pdfIn PDF document text
- http://vavesojijakoju.iblogger.org/38193293471.pdfIn PDF document text
- https://cdn.sqhk.co/waxubisolo/iFggijG/17587656447.pdfIn PDF document text
- https://pedamajemekiju.weebly.com/uploads/1/3/1/3/131380885/kepazuze.pdfIn PDF document text
- https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/dejafudujijamok.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://tedipokexumo.epizy.com/psalm_23_meaning_kjv.pdfIn PDF document text
- http://renaxodemebi.rf.gd/holika_holika_pure_essence_mask_sheet_review.pdfIn PDF document text
- http://wulimazef.epizy.com/sql_server_2016_express_offline.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e4ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4ED	5440 bytes
SHA-256: `865c2a68877510a0d2f60f96118ced09932a3a6a8790a670e18cededf0b6f2c3`
`font_01_sfnt_off0000f742.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF742	4564 bytes
SHA-256: `3c1e10d2a449d65f16dbc6504515718aafe2b917d76683da61b54361652c0700`
`font_02_sfnt_off0001087d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1087D	10656 bytes
SHA-256: `7236697c5b912573c3236403f24712dc2b751698aee56263e009b2013d7a4955`
`font_03_sfnt_off00012d37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D37	16036 bytes
SHA-256: `9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940`

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