PDF malware analysis — malicious · 5be5ffabcdf48a39

MALICIOUS

PDF

71.1 KB Created: 2021-02-25 03:10:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30

MD5: 8bbe14e6a4d613089acc92f1f6dfa201 SHA-1: 93c23ab8835163594d6d9fae720e437001d95468 SHA-256: 5be5ffabcdf48a397a7170a248dba767b8ae0ecf0ec3c4bdedb7b76d70fa94e0

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The embedded URL suggests a lure to download further malicious content, likely a PDF, disguised as a worksheet. No scripts were extracted, but the presence of external URLs and the nature of the detection point towards a phishing campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://jottigo.ru/wix?keyword=cardinal+and+ordinal+numbers+worksheet+doc PDF link annotation
- https://cdn-cms.f-static.net/uploads/4406514/normal_601cf71a680d6.pdfIn PDF document text
- https://cdn.sqhk.co/xuxovunevo/XpHqJpD/share_market_trading_courses_in_kolkata.pdfIn PDF document text
- https://cdn.sqhk.co/bugininaxi/VCJhicW/92987562312.pdfIn PDF document text
- https://cdn.sqhk.co/wokowuvawuz/fUjfNjf/bonevaverowimaxavalupitak.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369920/normal_6036870c9f243.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415331/normal_6035ac0b91209.pdfIn PDF document text
- https://cdn.sqhk.co/jesovolavig/hijLgjd/ringtones_download_apps_android.pdfIn PDF document text
- https://cdn.sqhk.co/mogudekusab/WDGJgge/810634794.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4489835/normal_5fcc6fbf91684.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380380/normal_5fd7ebe95f43f.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://bimuvugibane.rf.gd/8407565496.pdfIn PDF document text
- http://lurotibiripan.rf.gd/barrera_placentaria_farmacologia.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_off0000d9cf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9CF	5380 bytes
SHA-256: `3c857068fde04b6aac72d081e89c34c5cfcbc8e5e21c9c9b394ca1465700aa2f`
`font_01_sfnt_off0000ebf9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBF9	10412 bytes
SHA-256: `634151dfe1408216b4d568b32e11fd99e90eb70a73a5aa6ab1d23018461bf80a`

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