PDF malware analysis — malicious · 6acb4b2ceb161b48

MALICIOUS

PDF

89.4 KB Created: 2021-02-23 12:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 09cd5dba1fc59e665fcab57ea0665448 SHA-1: b76a0ef196d5d758e5682ea579e91497ccf52f7b SHA-256: 6acb4b2ceb161b4801998243bfe0e24d48b5951f57ff520b4e7f9ddd8008c02b

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further supports its malicious nature. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 6

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.
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://bologen.ru/123?utm_term=the+art+of+spirited+away+pdf+free PDF link annotation
- https://sefedajexoxoj.weebly.com/uploads/1/3/4/4/134479396/2275285.pdfIn PDF document text
- https://cdn.sqhk.co/merabuvi/cNcMwVz/zombie_road_racing_mod_apk_android_1.pdfIn PDF document text
- https://dawasaga.weebly.com/uploads/1/3/0/9/130969366/6094164.pdfIn PDF document text
- https://linajijokib.weebly.com/uploads/1/3/4/0/134000065/tifenovasugawagut.pdfIn PDF document text
- https://wizenifove.weebly.com/uploads/1/3/4/3/134308138/d0c0ea3a7.pdfIn PDF document text
- https://gamitodotabezoj.weebly.com/uploads/1/3/1/4/131453651/jisaguropajeseneme.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4406464/normal_5fd97dc134cb5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459164/normal_5fd6eb8bd3e2e.pdfIn PDF document text
- https://cdn.sqhk.co/nizivatitogu/f1WMgiv/real_football_3d_java_game_download.pdfIn PDF document text
- http://kmplitka.shop/usce_beograd_kontaktjdtc5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465127/normal_5fd865bcae547.pdfIn PDF document text
- https://wosuletoxo.weebly.com/uploads/1/3/0/7/130739711/mivudiwowavabo.pdfIn PDF document text
- https://cdn.sqhk.co/dilobowuz/NziVjaJ/revenge_of_the_ninja_full_movie_dailymotion.pdfIn PDF document text
- http://selowopax.22web.org/62061396555.pdfIn PDF document text
- https://nuresoxak.weebly.com/uploads/1/3/1/3/131380504/e077ad5ab.pdfIn PDF document text
- https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/b9e0e4c.pdfIn PDF document text
- https://dujisiseruw.weebly.com/uploads/1/3/0/7/130776106/0a3a36e454a2b.pdfIn PDF document text
- https://cdn.sqhk.co/bowewulaxam/iyjjjio/the_red_pyramid_egypt_facts.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
- http://bikumekomem.epizy.com/yahoo_mail_login_problem_android.pdfIn PDF document text
- http://femasusatatovet.epizy.com/hindu_college_nagercoil_application_form_2018.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_off00010fc4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FC4	4924 bytes
SHA-256: `970f8b58ef0cfcb0934943c5d6772b48b2d0a6897019304375d6e752836628fb`
`font_01_sfnt_off000120b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120B3	12496 bytes
SHA-256: `ffd7ca539006e18f7d8aea480227a78feedd850ce584bcbab2c45e79dc561ff7`
`font_02_sfnt_off000149c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x149C9	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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