PDF malware analysis — malicious · fa77f917448bf0dd

MALICIOUS

PDF

76.8 KB Created: 2021-07-12 22:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: acfedbfebd58dad5fdc6210cd896d3ab SHA-1: 81fbd7a15acfc6a5c1ea876884c5f7cbe73725cf SHA-256: fa77f917448bf0dd77f79f209591e7c6db9208d5aa3c608591ae0c3c877845e8

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a phishing attempt. The presence of embedded URLs, though many are marked as benign, suggests an attempt to redirect the user to malicious content. No scripts were extracted from this sample, but the overall structure and heuristic firings point towards a phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9680

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/razvivatel/yapz/~3/NsX9ihectO0/square?utm_term=teaching+wh+questions+speech+therapy
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8eb2704a383bbeda460f/1626115763135/zimedigadikososotefe.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8b50a076e3e03a9e743ec/1625863434978/zoberadebikunisusile.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e824a5ba333063f17b8128/1625826469255/tanha_meaning_in_tamil.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93585b673687559686b37/1625896325810/revised_new_oxford_modern_english_workbook_7_answers.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec8698b8cbe518df581f4a/1626113688345/marginal_and_absorption_costing_income_statement.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e88e4d7095f53b5d99ba44/1625853517360/meaning_of_warm_up_exercise.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7bc04efb14d11220fa531/1625799684683/currant_blister_aphid.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec9009c81c37306b2fa238/1626116105518/botozudalag.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_off0000cbd1.bin` `57170814be6d6eae17f79fdec18ee1f035c84f278b08e3eb614817a972dd38c8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCBD1	11016 bytes
`font_01_sfnt_off0000e52c.bin` `e03d8ff17307d24bf5bf8a9064c84f564b02917bf4b6976c67170ead1022f341`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE52C	15804 bytes
`font_02_sfnt_off00010d3b.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D3B	16792 bytes

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