PDF malware analysis — malicious · 82373b7c7fd2813a

MALICIOUS

PDF

83.7 KB Created: 2021-09-13 07:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: d2af3a435d44096e20cb8344b1a6cb2b SHA-1: 9b34413503b038bdf712979a049a088f8d07fbe9 SHA-256: 82373b7c7fd2813a811aea76f9a87e65572ee909fd2aaaf34d15fa703d800407

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm, with numerous URLs pointing to external sites, many of which are hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farm heuristics supports this attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://nomylo.ru/uplcv?utm_term=it+2+putlocker PDF link annotation
- https://architektor.ru/uploads/file/19065465388.pdfIn PDF document text
- https://myagenda.myagenda.cz/pictures/editor/files/63774783622.pdfIn PDF document text
- http://sin-hua.org/userfiles/sisazuguboxeditolaziga.pdfIn PDF document text
- http://www.centralperdana.com/file/pogevagotagatufizax.pdfIn PDF document text
- http://positiveforce.in/uploads/files/febovexezodimo.pdfIn PDF document text
- http://yonseri.org/userfiles/files/23608096114.pdfIn PDF document text
- http://0985028898.kad.tw/kads/ckfinder/userfiles/files/bipezivorujinawofasosod.pdfIn PDF document text
- https://discovercefalu.it/_data/images/file/papomodimusabu.pdfIn PDF document text
- http://southerncross-ex.com/images/blog/file/25517039761.pdfIn PDF document text
- http://willajarmar.pl/userfiles/file/dexariponabesetenosiwub.pdfIn PDF document text
- https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388b1eb9bae---88252777421.pdfIn PDF document text
- http://traviet36.com/upload/files/rarenid.pdfIn PDF document text
- http://mobiliteit.nu/files/81807157680.pdfIn PDF document text
- http://phanmemerp.vn/attachment/files/tibamaromuwezirike.pdfIn PDF document text
- http://dga.gr/ILC/img/file/wixamogepejebawakumemilud.pdfIn PDF document text
- http://dxczx.com/ckfinder/userfiles/files/20210908_110427.pdfIn PDF document text
- https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/q7hdvfmhavjuvt75i6a5vb9jc6/36061824854.pdfIn PDF document text
- https://smwebtechnology.com/arishayurveda.com/userfiles/file/tulinuberepiwuda.pdfIn PDF document text
- http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef9ce2e2bf---dazadesazegebigomuwomub.pdfIn PDF document text
- https://alharithiforcameras.com/ckfinder/userfiles/files/33449725837.pdfIn PDF document text
- http://seattledesis.com/fckeditor/file/79201028462.pdfIn PDF document text
- https://malabarmail.com/ckfinder/userfiles/files/77256333725.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://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_off0000e169.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE169	19932 bytes
SHA-256: `f3765c362f40a7e2466739dff0c30305727aed89d3cfd8933a8858b610240c65`
`font_01_sfnt_off00011509.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11509	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012d20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D20	10104 bytes
SHA-256: `dd7f9de84effad0ea5fce325554ac4d7970d9f566b7ff850163f23ef65f5c5ea`

Open this report in the interactive analyzer, or submit your own file for analysis.