PDF malware analysis — malicious · b11b2e05abab34da

MALICIOUS

PDF

78.3 KB Created: 2021-07-17 15:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 8d7766853405eba651feb82e2b1c2582 SHA-1: c09a6b164db0f30ecb011840dce6aa9d2081b11e SHA-256: b11b2e05abab34da93871049b0755f1ff492b058ccf18e7d716b66a94931b1fe

104 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as a phishing trojan. The 'SE_INVOICE_LURE' heuristic indicates the document's content is designed to resemble an invoice or payment request. While no scripts were extracted, the presence of embedded URLs suggests an attempt to redirect the user to a malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.8755

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Fake invoice / payment lure low SE_INVOICE_LURE

Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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/UZrB20b2Dcg/square?utm_term=revised+pay+scale+2016
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e9095d66be7e490f0ea5bf/1625885021575/13958675975.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee082036d5170423648fdf/1626212384352/working_capital_mcq_questions_with_answers.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1f53aa621f47bfcf638a0/1626469690864/how_fo_trading_works.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ede6757ce58f02ed94ca31/1626203765866/how_many_how_much_exercises.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed64384616123fc5fa9d1c/1626170424643/the_lords_prayer_in_hebrew_audio.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec706fa1f8f93f64a9fefb/1626108015728/gobura.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f17563e75c7a046d9fc707/1626436963453/bukemutukolodiwelumadat.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_off0000d1ce.bin` `6ba899bdb6c6cd87e8a09ab8cb2d9c12f86db41112cb4968f4a71d550eef42dc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1CE	10772 bytes
`font_01_sfnt_off0000ead2.bin` `776c90682a6ac87a8cd9cd45477c209229c2bfd4d623407eaa09bee0f415ef63`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEAD2	16384 bytes
`font_02_sfnt_off00011546.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11546	16792 bytes

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