PDF malware analysis — malicious · 90db33e9679d23dc

MALICIOUS

PDF

79.5 KB Created: 2021-03-20 16:00:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: 98c9e4882f19c9f38d2f13078ccd9413 SHA-1: 9cc5c131ffff281bab30c1c51601e52933eb5e53 SHA-256: 90db33e9679d23dc19ebbccfd284de0ba856e052ab5388f07c06aead13a787b5

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, identified as a link farm hosted on disposable domains and Weebly. The primary purpose appears to be directing users to potentially malicious websites, as indicated by the ClamAV detection and ML classifier flagging it as malicious. The embedded URLs are likely part of a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/123?utm_term=amu+online+form+2018+class+11 PDF link annotation
- https://tibufidis.weebly.com/uploads/1/3/0/7/130740046/c728f3a725ccd29.pdfIn PDF document text
- https://borerejo.weebly.com/uploads/1/3/4/0/134040615/miwup-lujonu.pdfIn PDF document text
- https://natesikapepik.weebly.com/uploads/1/3/4/7/134750077/125da93.pdfIn PDF document text
- http://wasegulom.mygamesonline.org/godewimoxagezaxesiradojev.pdfIn PDF document text
- https://lexizade.weebly.com/uploads/1/3/4/3/134368494/lezuluba.pdfIn PDF document text
- http://pezejij.mygamesonline.org/gerenciamento_de_riscos_ambientais.pdfIn PDF document text
- https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/xawagerejepovomoner.pdfIn PDF document text
- https://wisukasef.weebly.com/uploads/1/3/1/4/131453855/5723521.pdfIn PDF document text
- https://meporolokiso.weebly.com/uploads/1/3/2/6/132681401/b7448585d26.pdfIn PDF document text
- https://dakesepev.weebly.com/uploads/1/3/4/3/134308776/1147361.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366385/normal_603b76da623cc.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4368751/normal_5fef6278490e4.pdfIn PDF document text
- https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/bc5da.pdfIn PDF document text
- https://waderiraxobo.weebly.com/uploads/1/3/4/5/134505054/murevi-tubeweko.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4464873/normal_5fcdea6d76a00.pdfIn PDF document text
- https://vavavutexe.weebly.com/uploads/1/3/4/4/134441002/jizofox.pdfIn PDF document text
- https://zifuxiwow.weebly.com/uploads/1/3/3/9/133997311/poroxibakira-godamava.pdfIn PDF document text
- https://famofupogatom.weebly.com/uploads/1/3/0/7/130739443/fonuruzuferofodufem.pdfIn PDF document text
- http://wijetaz.mypressonline.com/83216983071.pdfIn PDF document text
- https://nodudovipum.weebly.com/uploads/1/3/4/7/134711526/4367689.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://zimemotom.rf.gd/92184006275.pdfIn PDF document text
- http://fetufebutegiv.rf.gd/identity_game_android.pdfIn PDF document text
- http://dukodisedibuji.epizy.com/que_siente_el_bebe_en_la_panza_cuando_se_tiene_relaciones.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f862.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF862	5536 bytes
SHA-256: `c69c78cb24eee32d3ffde3de2f4ee4663f826e9d7094536623d49c1b7beeab8e`
`font_01_sfnt_off00010b20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B20	10948 bytes
SHA-256: `08308e0841f0fc68f5bea90de70196f6715ca68b5cdd0b3a977eccadaf85fcbf`

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