PDF malware analysis — malicious · 2c2c0300ceb51ce2

MALICIOUS

PDF

81.9 KB Created: 2021-02-26 19:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: 84cae3f820a020f0f4973650b3e84328 SHA-1: fa11d03f04cfd3c7760befae21d5fec92f4d7c44 SHA-256: 2c2c0300ceb51ce201e4cdee2c820b4c637178fc65ab5da76407b51cfe38e585

204 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains a large number of external links, many of which are hosted on S3 buckets and appear to be part of a link farm designed to obscure malicious destinations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains references to a Samsung manual, suggesting a lure to trick users into clicking on malicious links.

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.
LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND

Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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://druttle.ru/wb?keyword=samsung%20rf263beaesr%20owners%20manual PDF link annotation
- https://static.s123-cdn-static.com/uploads/4446507/normal_5fcf1453bf936.pdfIn PDF document text
- https://cdn.sqhk.co/nupozifulija/U5ANjbG/w3schools_php_tutorial.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382773/normal_6023d90aeaae2.pdfIn PDF document text
- https://cdn.sqhk.co/bidekidarub/c2QckbA/mens_hairstyles_long_on_top_curly.pdfIn PDF document text
- https://cdn.sqhk.co/vunalogivefu/gjjijjg/golden_boot_winners_2019.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4475212/normal_5fff33db91da1.pdfIn PDF document text
- https://latezuletarok.weebly.com/uploads/1/3/5/2/135298634/7627414.pdfIn PDF document text
- https://cdn.sqhk.co/muxaferamet/ydX5hgT/ikea_desk_top_wood.pdfIn PDF document text
- https://tajujarosoko.weebly.com/uploads/1/3/4/7/134749081/sunavo.pdfIn PDF document text
- https://cdn.sqhk.co/reriwoduriju/f6vQE4p/mosavuvabewugaweviboxuga.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417029/normal_601ee7904ecb2.pdfIn PDF document text
- https://cdn.sqhk.co/vunalogivefu/gjjijjg/golden_boIn macro / runtime command snippet
- 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/tobito/architecture_technical_drawing.pdfIn PDF document text
- https://s3.amazonaws.com/rexogeguxosix/83197822415.pdfIn PDF document text
- https://s3.amazonaws.com/jozaponi/19081608000.pdfIn PDF document text
- https://s3.amazonaws.com/nodetuxapabara/29812856025.pdfIn PDF document text
- https://s3.amazonaws.com/jarawaxanivu/90825305038.pdfIn PDF document text
- https://s3.amazonaws.com/jiwisigetizoxif/gasofuzotipixiligubisade.pdfIn macro / runtime command snippet
- https://s3.amazonaws.com/rixevozajixezos/afari_e_frig_audio_song_free.pdfIn PDF document text
- https://s3.amazonaws.com/dudigonifu/reject_interview_template.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_off0000f1ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1EA	5624 bytes
SHA-256: `f5287ccf4a693adb87789b1d3c064b180137b40291b9eb6035a3159920219c44`
`font_01_sfnt_off000104ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104EE	11356 bytes
SHA-256: `b7d745aa72cac84be4e923fd3cde1798f2434d01e061251b59b93fd3ce73ef82`
`font_02_sfnt_off00012bdf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BDF	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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