PDF malware analysis — malicious · 4958836a0f245a10

MALICIOUS

PDF

72.1 KB Created: 2021-07-13 17:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: c50db6bbd01edf383e303f5d86be0e76 SHA-1: 53e8834aadbeedeac6c9e9b18198dccac60a52a3 SHA-256: 4958836a0f245a10094c34f4ea6c2b809b46019230af86c0f959610c867fa269

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs that, while some are marked benign, suggest an attempt to redirect the user to external resources. The presence of PDF-specific heuristics like PDF_URI and EMBEDDED_URL, combined with the ML classification, points towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9511

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://feedproxy.google.com/~r/sq/ugae/~3/WVKuihPcy9U/square?utm_term=subscribe+the+channel
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8d207a0ce97462827a32b/1625870855526/mobile_and_wireless_communication_book.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec78204c0b954f9ea31bd0/1626109984899/chatterbox_gary_full_episode.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e85922700af648fd11c990/1625839906351/areas_of_physiotherapy.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed0b2d39532c3941bc5bed/1626147629812/install_windows_10_to_gpt_disk.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec76a77e5cd11affcbd45a/1626109607419/indian_tonic_water_for_cramps.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e9249acc7c08645926f5cf/1625891994894/iskysoft_editor_pro_for_mac_review.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e77136ed752f59ce2aebb0/1625780534558/vesetapivafajesusebiwita.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed9a76e0c6fb606613916b/1626184311142/daily_full_body_mobility_routine.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bba4.bin` `a00998c42629026c01e3c7876f7c92d432021ef5d8f2724414fe01e7983e4a23`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBBA4	15788 bytes
`font_01_sfnt_off0000e4b0.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4B0	16792 bytes
`font_02_sfnt_off0000fcc7.bin` `690dea44448e91c9f6ae8fadda1ecaea692c37cd03f06012a2b1cd6ba5f5bce8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCC7	10520 bytes

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