PDF malware analysis — malicious · d338a0781c4832db

MALICIOUS

PDF

79.8 KB Created: 2021-07-14 00:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: a8367fd3f29eb1a0d83ffb7bfb4d8fc3 SHA-1: a3351e59a79c208fe63e2d66ece4b4418cb974c7 SHA-256: d338a0781c4832dbe1e8a63a07d36843108323d229e886ab052257c1002a3c0a

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to malicious content or exploit a vulnerability. The PDF structure itself shows signs of manipulation with duplicate object bodies.

Machine Learning

Nyx PDF Classifier malicious score 0.9478

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/sq/ugae/~3/UQ8tT55rDuk/square?utm_term=a+strange+wrestling+match+class+6+questions+and+answers
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee07c41cf0e6777f2a4695/1626212292462/emulsifiable_concentrate_meaning.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed90daf67381323ef956a3/1626181851079/tasuzerujomobopojujewo.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e889ff91a9976fca48b2a0/1625852415607/another_word_for_regret.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edd891d6ef6771c1db563d/1626200209177/growth_chart_meaning.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecac717b14134336e097f0/1626123377687/tejidumagegutezav.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee085d8feeeb055d95c2c2/1626212445974/pearson_education_limited_2009_exploring_science_answers.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e9474edc37083541b9f419/1625900878216/19462010425.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed9bd7881afe0f0cebb9fe/1626184663795/lodulepare.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_off0000d44d.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD44D	16792 bytes
`font_01_sfnt_off0000ec5f.bin` `a27898f4bcdf53791edefa9d122b6403a3182260a44cbc1a550f97c0bbb2e32f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC5F	17048 bytes
`font_02_sfnt_off000118b1.bin` `37c853c89a015edc8a56bf171e8031459bc753437a7a114c7a84a98232b61e4c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x118B1	11296 bytes

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