PDF malware analysis — malicious · 0a525513e4d56ee2

MALICIOUS

PDF

83.8 KB Created: 2021-05-22 08:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22

MD5: 1b6a95247569f5585628c2052725d8ab SHA-1: df97b420ffe19eede45b5abd2baaca21d01d3a22 SHA-256: 0a525513e4d56ee2dac550fba0f17eefe5182b8dc2b0b53835544aa5b16168f8

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://golowaki.ru/strik?utm_term=java+netbeans+download+for+windows+8.1+64+bit PDF link annotation
- https://tulosiwawi.weebly.com/uploads/1/3/5/3/135326734/5dac0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405193/normal_5fd27cfee6d4d.pdfIn PDF document text
- https://gesojotumone.weebly.com/uploads/1/3/4/6/134614539/xujemu.pdfIn PDF document text
- https://lewuroluloxujul.weebly.com/uploads/1/3/4/6/134678017/zidoruti.pdfIn PDF document text
- https://kemipopebu.weebly.com/uploads/1/3/4/5/134585234/jinuvoz.pdfIn PDF document text
- https://wesafave.weebly.com/uploads/1/3/4/3/134307961/9953e0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466662/normal_602e136716a80.pdfIn PDF document text
- https://dexanobibe.weebly.com/uploads/1/3/5/2/135299911/kakuruvovad_repopujurod_liguxa.pdfIn PDF document text
- https://gijopufiri.weebly.com/uploads/1/3/1/3/131384250/pafixozejipujo_xolagivoxegi_polirutotel.pdfIn PDF document text
- https://finukezazilifer.weebly.com/uploads/1/3/0/7/130776017/nidalasozupo-muvan.pdfIn PDF document text
- https://movimuwetimegi.weebly.com/uploads/1/3/4/3/134342740/xunewo-takikapaw-fevomuzep.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4460255/normal_5fccd340878be.pdfIn PDF document text
- https://bufasijo.weebly.com/uploads/1/3/2/7/132740378/5c0cd4.pdfIn PDF document text
- https://kivalake.weebly.com/uploads/1/3/4/8/134885121/c4a21805bd761.pdfIn PDF document text
- https://jolovezenokomo.weebly.com/uploads/1/3/1/3/131398109/e2fd09.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4483856/normal_6015b0de822f5.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/xufoxorog/defur.pdfIn PDF document text
- https://s3.amazonaws.com/lodazojamuva/27065895400.pdfIn PDF document text
- https://s3.amazonaws.com/debiwelof/65673629722.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_off0000f95a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF95A	5492 bytes
SHA-256: `f9775225ab8a5df3b4bae3710a35cdf8f003e58c5d1941541d28c4860f1e27ca`
`font_01_sfnt_off00010c29.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C29	11476 bytes
SHA-256: `f8773834e59a1b0ef7be0499caccebf9370bf73b4b7ab2e7138c19a02be54483`
`font_02_sfnt_off0001330a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1330A	4324 bytes
SHA-256: `ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230`

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