PDF malware analysis — malicious · 47f88715bba1a63f

MALICIOUS

PDF

75.2 KB Created: 2021-09-26 20:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: 6ee6e0397c1e4f69ef9e7b00a4c245dc SHA-1: 363cf73f2fa40764b7975352035e1dc0f22b41e3 SHA-256: 47f88715bba1a63f9b2b1ded1cba5223a9b7f8e61510843a5baa7e7e42554ac6

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm. ClamAV and ML classifiers have identified this PDF as malicious, specifically flagging it as a phishing or trojan threat. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9919

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
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 https://smidgel.ru/uplcv?utm_term=vumoo+android+app PDF link annotation
- https://footballsod.com/images/ck-uploads/files/46000738893.pdfIn PDF document text
- https://rallstarawards.us/nbloom/fckuploads/file/rozurepenawabomuseni.pdfIn PDF document text
- http://pngroup.pl/ckfinder/userfiles/files/89841750102.pdfIn PDF document text
- https://alev.az/userfiles/file/99381031213.pdfIn PDF document text
- http://zamgph.com/FCKeditor/editor/filemanager/connectors/php/uploads/file/252152071775.pdfIn PDF document text
- http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146d0bccad3d---zujaki.pdfIn PDF document text
- http://hamdannepal.com/userfiles/file/titezozi.pdfIn PDF document text
- http://www.bongbansaigon.com/uploads/files/xufopuxuf.pdfIn PDF document text
- http://kolesa.sk/files/lovuzozapi.pdfIn PDF document text
- https://arab-hams.com/Ups/files/7129119606.pdfIn PDF document text
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/4216bfa4072fab957e2d2e057137ce77/letidofenerodudokepo.pdfIn PDF document text
- http://kanomax-nsk.ru/images/sasasonesa.pdfIn PDF document text
- https://proxus.nl/file/69713443938.pdfIn PDF document text
- http://digilit.ir/basefile/digilitir/files/40661630599.pdfIn PDF document text
- http://anadolumatbaa42.com/genelresimler/file/zezivojarinepane.pdfIn PDF document text
- https://marathonroller.com/userfiles/files/gubemasonuzusesopa.pdfIn PDF document text
- http://hz-kontejnery.cz/ckfinder/userfiles/files/67850212983.pdfIn PDF document text
- http://teplorium.su/userfiles/file/71618484934.pdfIn PDF document text
- https://haruhonpo.com/upload/haruhonpo/files/64982147271.pdfIn PDF document text
- https://bulendengin.com/upload/ckfinder/files/8291353040.pdfIn PDF document text
- https://nezrenweb.com/calisma2/files/uploads/kiropipafok.pdfIn PDF document text
- http://taikenplan.jp/ckfinder/userfiles/files/14491366920.pdfIn PDF document text
- https://phunhai.net/upload/files/vikejogenu.pdfIn PDF document text
- http://tradotel-riviera.com/file/togixedobupam.pdfIn PDF document text
- http://e1pl2.nazwa.pl/busy/fotki/file/kodod.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_005_off00010396.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x10396	17316 bytes
SHA-256: `c8a93f2ea062280ff7728f9a35006ca0cc7fac225bcc07297df56305a43cfce4`
`font_00_sfnt_off0000af60.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAF60	10180 bytes
SHA-256: `4202111baa3c7d8192ba724480201fad0503a2dfd4bd3e0fb0c950657f429049`
`font_01_sfnt_off0000c607.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC607	15044 bytes
SHA-256: `977024636eac387284d882302d4364200b2f06c6a895dbe4bc81a9bbae328836`
`font_02_sfnt_off0000eb85.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB85	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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