PDF malware analysis — malicious · de77687430668b87

MALICIOUS

PDF

76.3 KB Created: 2021-07-18 02:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 51c060ee7e79e48aa980951531e30173 SHA-1: ca1b7db45b95ae14a9d3e647aadc04a71ced527b SHA-256: de77687430668b87461ccf9a34e29da0793edc7917d027f6e83a45801540ced4

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 multiple embedded URIs that point to external resources, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the presence of embedded URIs and the overall detection score strongly suggest the document is designed to redirect users to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9680

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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/iXsW93xxTQA/square?utm_term=inverse+function+calculator+with+solution
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2c031a8f65e35b6d2c20e/1626521649353/four_letter_word_for_intercourse.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7df6f4261ba79806149a4/1625808751143/fezibolejedinefixo.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec943944349d7bb06dbf1b/1626117177396/painful_latch_on_one_side.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edd711a50f6e33a32369b9/1626199825949/semaxusulaxofoxamowu.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee3fa58685745b7d151e4d/1626226597539/review_film_end_game.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee83d9fd66ff3739f25b3c/1626244057672/who_is_jax_on_sons_of_anarchy.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f35815c5d9e6782ce1eba8/1626560533196/86817782935.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f36019c5d9e6782ce25a1d/1626562585102/kovagoxiludis.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_off0000c65c.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC65C	16792 bytes
`font_01_sfnt_off0000de73.bin` `9afc969a2455b764b6e947ba6f81a909be44d631ae7a647e9e83714199d367be`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE73	10636 bytes
`font_02_sfnt_off0000f6d2.bin` `617733c51e1a3be144ea5e17701db0c4daf36b1ef215ed16bee06d9b1e7f40f0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6D2	17584 bytes

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