PDF malware analysis — malicious · 6b335da26f65de6d

MALICIOUS

PDF

72.2 KB Created: 2021-09-13 10:19:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 7a18e52d29ecd4b952573912992c445a SHA-1: 291222d237b910f962626610f5a8638c190532a7 SHA-256: 6b335da26f65de6d0bd89aad4ba87de3a8f0bd12c967f5716bd2193b021e4133

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or redirection scheme. The PDF structure and the presence of external URIs are consistent with techniques used to deliver malicious content or redirect users to compromised sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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 http://weddingdove.tw/uploads/files/202109051224194068.pdf In PDF document text
- http://cncforginghammer.com/d/files/lolivesafudire.pdfIn PDF document text
- https://serpavenger.com/ckfinder/userfiles/files/78126969917.pdfIn PDF document text
- http://igs.compcierge-asia.com/ckfinder/userfiles/files/38260881392.pdfIn PDF document text
- https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/64638976924.pdfIn PDF document text
- http://twtime.com/uploads/files/202109131509118895.pdfIn PDF document text
- https://mallorcaboom.com/res/wysiwyg/file/57559566846.pdfIn PDF document text
- http://scuolascifondocortinadolomiti.it/userfiles/files/82599157393.pdfIn PDF document text
- http://fgosvo.ru/files/files/wigozopufifamak.pdfIn PDF document text
- http://luisacortesearchitetto.it/userfiles/files/76470645456.pdfIn PDF document text
- http://webinaris.eu/ckfinder/userfiles/publics/files/51204662844.pdfIn PDF document text
- https://floridahouselottery.com/test/userfiles/file/67933159121.pdfIn PDF document text
- https://billionbosses.com/ckfinder/userfiles/files/pukegerige.pdfIn PDF document text
- http://jumpstart.mobi/ckfinder/userfiles/files/68685916358.pdfIn PDF document text
- https://samsungklima.net/upload/ckfinder/files/11611325700.pdfIn PDF document text
- http://soeurs-scjboran.fr/soeurs/upload/files/77935282436.pdfIn PDF document text
- http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341c64e64d7---noxokavetogiwega.pdfIn PDF document text
- https://groupunsur3.com/contents/files/50896115614.pdfIn PDF document text
- http://kastely-vacduka.hu/fileok/file/webomatodarapovatoritad.pdfIn PDF document text
- https://whiteplacard.com/UserFiles/file/92345734152.pdfIn PDF document text
- http://defhjdr.friend-match.com/upload/files/karagimasekuzudevolizona.pdfIn PDF document text
- https://etonbio.com/newsLetters/images/file/2009895397.pdfIn PDF document text
- http://svx.su/ffile/file/lurekutumikezodirivawewu.pdfIn PDF document text
- http://pamatudarbai.lt/ckfinder/userfiles/files/balufezijamifulukifek.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=the+power+of+japanese+candlestick+charts+fred+tam+pdfPDF 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_off0000b792.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB792	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cfa9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCFA9	11156 bytes
SHA-256: `f16a0c1c57ec30ce5787250d6575a1b25a0721dfe645ea9860461e2d51d81736`
`font_02_sfnt_off0000e995.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE995	16064 bytes
SHA-256: `eeea39758cec762db532bbadd8ca020ccba49aca57a3f9ba6804380130516175`

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