PDF malware analysis — malicious · 12ab87b76df6781b

MALICIOUS

PDF

90.1 KB Created: 2021-09-13 07:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: d0b709124e9675efca677d796c39705f SHA-1: 824fda08d5a6335471654097e86666ae2b49d40f SHA-256: 12ab87b76df6781b92b17b7b722a645bf5619c94fd87deee935896c5e37d5f6a

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier. A high-severity heuristic indicates the document attempts to trick users into executing commands by copying clipboard content into a shell. This suggests the PDF is designed to facilitate the execution of a secondary payload, likely downloaded from one of the embedded URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9937

Heuristics 6

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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 http://sin-hua.org/userfiles/46696872035.pdf In PDF document text
- http://daegyung.kr/userfiles/file/20210912073013.pdfIn PDF document text
- http://khyljg.com/uploadfiles/files/51315750244.pdfIn PDF document text
- https://singhaniabrothersltd.com/ckeditor/ckfinder/userfiles/files/9408275664.pdfIn PDF document text
- https://moolans.com/uploads/files/ninipujukonatuz.pdfIn PDF document text
- https://pfollowers.com/ci/userfiles/files/59532892367.pdfIn PDF document text
- https://svetplus.com/userfiles/files/fapejifevasawi.pdfIn PDF document text
- https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/161336ba34fe92---refelitoranunizago.pdfIn PDF document text
- http://ozhelalikram.de/resimler/files/78975247667.pdfIn PDF document text
- http://lexxyin.net/files/fckeditor/file/xiluzuvakejexibuvodafe.pdfIn PDF document text
- http://donghobaoan.com/uploads/files/69717631183.pdfIn PDF document text
- https://mobilpetrol.olajpark.hu/files/files/97268510457.pdfIn PDF document text
- https://kotypsy.pl/ckfinder/userfiles/files/vegozi.pdfIn PDF document text
- http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/konotapetavewafi.pdfIn PDF document text
- http://niezapominajkowo.eu/userfiles/file/38923960312.pdfIn PDF document text
- http://vntattoosupply.net/uploads/image/files/48272232900.pdfIn PDF document text
- http://mg001.cn/upload_fck/file/2021-9-11/20210911013600280518.pdfIn PDF document text
- https://holyfamilyhospitals.com/ckfinder/userfiles/files/86734627547.pdfIn PDF document text
- http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/lezes.pdfIn PDF document text
- http://jikaramen.com/uploads/files/lozomagitanopubu.pdfIn PDF document text
- http://bertrandetgastineaudesigners.com/userfiles/file/98566267940.pdfIn PDF document text
- https://eternalbliss.net/file/xidojipoxi.pdfIn PDF document text
- https://ist-lb1.istanajp.com/contents/files/22818192806.pdfIn PDF document text
- https://yellowmangocafe.com/userfiles/file/xuxikog.pdfIn PDF document text
- http://sovaimm.it/userfiles/files/90336671227.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=mumu+app+player+pokemon+goPDF link annotation
- 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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f972.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF972	18696 bytes
SHA-256: `35800a857fa3e7fd4521ce06244ad018d69ced12d51169619bc40a76bf0ac48e`
`font_01_sfnt_off00012b05.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B05	10536 bytes
SHA-256: `d7d8cdd6fc8ca7882b3ade0546a5aa33a609d57b94e45ead17338ee478175a71`
`font_02_sfnt_off00014306.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14306	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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