PDF malware analysis — malicious · 7a96b347d39896bb

MALICIOUS

PDF

82.2 KB Created: 2021-03-09 10:26:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 98783641e0850db5c0d37b911f29e1cc SHA-1: c4d32a72b7abdcdf85c134c507f15dce9bc9a9a0 SHA-256: 7a96b347d39896bbdb7548aca8be5d0760822ecf4842a3fbf28375474d48bf27

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to free software downloads, which is a common tactic for phishing and malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 5

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.
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.
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/123?utm_term=free++audacity+for+windows+7 In PDF document text
- https://cdn-cms.f-static.net/uploads/4369161/normal_5fdac2a9af1cf.pdfIn PDF document text
- http://jogemijafiw.22web.org/call_to_remembrance_farrant_sheet_music.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471513/normal_5fdb0bf18ff6e.pdfIn PDF document text
- https://cdn.sqhk.co/vakolitakap/iihhHvC/madip.pdfIn PDF document text
- https://revowerixes.weebly.com/uploads/1/3/1/6/131607662/9557678.pdfIn PDF document text
- https://cdn.sqhk.co/pujixefan/hN61hfD/vidipox.pdfIn PDF document text
- http://gibipimaxadebip.iblogger.org/rokasadiwafareregojozat.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371523/normal_602d66b88573d.pdfIn PDF document text
- http://tabekam.22web.org/abrasive_form_illinois.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367941/normal_601752b3ad70c.pdfIn PDF document text
- http://pifofumega.22web.org/76736847373.pdfIn PDF document text
- https://xinorexuvon.weebly.com/uploads/1/3/4/6/134608307/demowebut.pdfIn PDF document text
- https://falojixij.weebly.com/uploads/1/3/4/8/134878909/dagav_robevanunijuje.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4448332/normal_5fcdb9f4d4529.pdfIn PDF document text
- https://rudabukonavapuk.weebly.com/uploads/1/3/4/0/134016662/7698053.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/xuzed/34276126140.pdfIn PDF document text
- http://nazonuretowu.epizy.com/bharat_movie_trailer.pdfIn PDF document text
- http://bamoxopigodarok.epizy.com/mejikalefoxadoweginu.pdfIn PDF document text
- https://s3.amazonaws.com/mokamoba/wallpaper_anime_naruto_hd_android.pdfIn PDF document text
- http://botusojulepeja.rf.gd/how_to_set_up_meeting_on_google_meet_on_iphone.pdfIn PDF document text
- http://wuvelar.epizy.com/dulces_mentiras_amargas_verdades_3_google_drive.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_off0000eceb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECEB	5212 bytes
SHA-256: `1024e3e088cb6276ef5ccae44fb36787dcd2311185007b94364f66e643353e43`
`font_01_sfnt_off0000feda.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEDA	11008 bytes
SHA-256: `9bca0714ca1691512646cd9f9be06126117cba2c13ee465f174f7e11ef9fb989`
`font_02_sfnt_off0001249c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1249C	16520 bytes
SHA-256: `166d08eab945c41f32142690f4f7abd040d66486329cd3dba31a92f857d1ab67`

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