PDF malware analysis — malicious · ddc83e8ef6006afe

MALICIOUS

PDF

72.2 KB Created: 2021-03-02 12:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 81f2b1d27bbc9e1eb39a32cad5a9a67c SHA-1: 7e133e14a138431ab72418660147315e1b98cb7e SHA-256: ddc83e8ef6006afe2bccf33125f0708a589da5801da242a25cbc27be3cd92317

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://crophysi.ru/strik?utm_term=14000+things+to+be+happy+about+vk'. This indicates the document's primary purpose is to redirect users to a malicious site, likely for phishing or malware distribution. No scripts were extracted, but the embedded URL is a strong indicator of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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://crophysi.ru/strik?utm_term=14000+things+to+be+happy+about+vk In PDF document text
- http://bapebofefo.22web.org/72536144831.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453326/normal_60184b5e4ac44.pdfIn PDF document text
- http://allerop.xyz/11628310552l5jxz.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/bovenotojitowe/kepemobeguxolarijoli.pdfIn PDF document text
- https://s3.amazonaws.com/xixonu/a4_size_brochure_psd_free.pdfIn PDF document text
- https://s3.amazonaws.com/wuvepilamamuse/instagram_apk_without_play_store.pdfIn PDF document text
- http://zolefirujiwi.rf.gd/kentucky_fried_chicken_song_lyrics.pdfIn PDF document text
- https://s3.amazonaws.com/toliwudalamem/firofunuwozutexin.pdfIn PDF document text
- https://s3.amazonaws.com/xeruxaxer/83259314457.pdfIn PDF document text
- http://fataragoreb.myartsonline.com/optiplex_7010_driver_cab_windows_7.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_off0000db6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB6C	5504 bytes
SHA-256: `389d01cbcb5a4ae3b5fa83220c0e42f31d351f2462669a1a6ce317de5b36f91b`
`font_01_sfnt_off0000ee46.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE46	11248 bytes
SHA-256: `4ae8ae9062068c386e57b31574948023298087b97683b8c235cc29efa1096b36`

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