PDF malware analysis — malicious · ed1932adc87000a3

MALICIOUS

PDF

82.7 KB Created: 2021-05-24 22:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: b030d8376227ff9c7873dc7d5ed18192 SHA-1: e5419ea4cb732c94ceb02a75fce8cfcb5dda6e71 SHA-256: ed1932adc87000a375f1f8e18d5ea0093c96a1c3dd050b372f367bcfcc42cd05

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://resalured.ru/strik?utm_term=what+does+giving+someone+bunny+ears+mean', likely serves as a redirector to malicious content.

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://resalured.ru/strik?utm_term=what+does+giving+someone+bunny+ears+mean PDF link annotation
- https://cdn-cms.f-static.net/uploads/4443809/normal_600dc5d0ecc09.pdfIn PDF document text
- https://fadefewili.weebly.com/uploads/1/3/4/3/134316521/3956270.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4391303/normal_6055dfc785975.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378406/normal_6065f0f327be5.pdfIn PDF document text
- https://vojiviroli.weebly.com/uploads/1/3/2/3/132302855/zufuk.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382789/normal_604f0d7b3a025.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4467979/normal_601f33c4d834c.pdfIn PDF document text
- https://xakuwije.weebly.com/uploads/1/3/4/3/134340554/rejudexudasupu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388177/normal_60262c4114805.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4471238/normal_5fc8e63bef450.pdfIn PDF document text
- https://diwekapuxejube.weebly.com/uploads/1/3/1/4/131455019/mozodatowinozif.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446643/normal_605f7762ec601.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4369772/normal_5fe2ac930c800.pdfIn PDF document text
- https://xezuzevujuniz.weebly.com/uploads/1/3/4/5/134586082/f0e856e1d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484994/normal_603bebb17af04.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4492593/normal_60697e6b3b218.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4378167/normal_5ff1ccd26b232.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411686/normal_602dcddbe09ff.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/wufujudisu/fefanegonojiwamabadama.pdfIn PDF document text
- https://s3.amazonaws.com/wofaxil/93704615854.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eac9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEAC9	5524 bytes
SHA-256: `10fc19fa6b1341f808a2d57e6b0c45e44ce02962e76fca32dd901af085616cc7`
`font_01_sfnt_off0000fd79.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFD79	12040 bytes
SHA-256: `9790d661ae3fa91a6a83cada1bb24b84e42da1fdbd7c0d9cb87ce0bdfbfbe5bb`
`font_02_sfnt_off000126d8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126D8	16036 bytes
SHA-256: `35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f`

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