PDF malware analysis — malicious · 8d7dc59ce7f6b852

MALICIOUS

PDF

71.7 KB Created: 2021-02-24 08:13:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17

MD5: b9f39f6afc78d88c5566a66cfdfd1855 SHA-1: d152f750a1248abc2271d72ed18da04f1260c905 SHA-256: 8d7dc59ce7f6b8528f2434cb9226b13f9c4fa39df00feb477c42a7d020eb9d5a

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high probability of malicious intent. An external URI pointing to 'jottigo.ru' was extracted, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and the presence of an external URL are indicative of a common phishing lure.

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/strik?utm_term=cutting+for+stone+meaning+hippocratic+oath PDF link annotation
- https://cdn.sqhk.co/lusimalifa/jXQghoy/spina_bifida_in_adults_surgery.pdfIn PDF document text
- https://cdn.sqhk.co/xafukapewe/gjNieok/bike_mayhem_free_hack_mod_apk_download.pdfIn PDF document text
- https://cdn.sqhk.co/xemugugafot/aLhhkgh/disney_alien_claw_machine_arcade_game.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4404528/normal_5fc7fd11eafaf.pdfIn PDF document text
- https://cdn.sqhk.co/zenetofuma/uje3igU/5842790054.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://disofebuwugojuj.epizy.com/ganafupinovujok.pdfIn PDF document text
- https://s3.amazonaws.com/tesapibebujep/linaneferijulakuxuxoxes.pdfIn PDF document text
- https://s3.amazonaws.com/wudibirewuduto/netdania_netstation_free.pdfIn PDF document text
- https://s3.amazonaws.com/zisulamisozoto/lozomileto.pdfIn PDF document text
- https://s3.amazonaws.com/juzinaramip/mawekulaw.pdfIn PDF document text
- https://s3.amazonaws.com/kefiperizonofu/correlation_vs_causation_worksheet_psychology.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_off0000daaa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDAAA	5304 bytes
SHA-256: `08cc1fc99076e40dcffd6d8e177c91cada6ea3cd71ea5ffa9a84d750f2793728`
`font_01_sfnt_off0000ec8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC8C	11580 bytes
SHA-256: `23bcaccb84091f15c5f112fa9bc070f8ab1c68c4432caaf39f9ca923bf25c871`

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