PDF malware analysis — malicious · dcac1af4363020d2

MALICIOUS

PDF

76.3 KB Created: 2021-04-19 23:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 6315cebb96cf86816dfbdfdc500e092d SHA-1: 32b5ff88a0d58791e61c44fe5a598de5499dd112 SHA-256: dcac1af4363020d2086c8de5dcb2ce6926f75f7f1a0920a33ea5e0258e607d00

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that, while currently benign, is likely part of a phishing or malware distribution chain. The document body, though heavily obfuscated, suggests a lure related to 'Akira manga and anime comparison', intended to trick users into visiting malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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://www.mainephilanthropy.org/sites/default/files/kimakevenowafuxopepasu.pdf In PDF document text
- http://cicatsalud.com/html/sites/default/files/webform/99368311749.pdfIn PDF document text
- http://klm3fg.grhosting.cz/sites/default/files/webform/files/zavemazawutojene.pdfIn PDF document text
- https://www.enwidth.com/sites/default/files/webform/resumes/60015669747.pdfIn PDF document text
- https://www.pharoxglobal.com/sites/default/files/webform/6669476875.pdfIn PDF document text
- http://cicatsalud.com/html/sites/default/files/webform/17654710786.pdfIn PDF document text
- https://ambrose.edu/sites/default/files/webform/85138354947.pdfIn PDF document text
- http://cicatsalud.com/html/sites/default/files/webform/61943826361.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=akira+manga+and+anime+comparisonPDF link annotation
- https://minorsoncampus.princeton.edu/system/files/webform/45540448673.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e282.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE282	3492 bytes
SHA-256: `2661427452891fe991cb046bf1f01ffd25e94bcbc94bc31dc35564828dffb1cc`
`font_01_sfnt_off0000eee6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEE6	5412 bytes
SHA-256: `e2c1ac6f68e4cbb4641053d264b7b9415a5b9043f430947d285be4a6319030e4`
`font_02_sfnt_off0001013e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1013E	10268 bytes
SHA-256: `a915bb8bf632fa22a3d28e6e330b1bbc57a96c67dbc339e9534c8e9c6fc26818`

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