PDF malware analysis — malicious · 42e25d2ac6886134

MALICIOUS

PDF

80.9 KB Created: 2021-09-22 17:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: a26cffe520b63f30d05d69e76ea99dba SHA-1: 7789d02555ca3c8d2da335df2970097bc827af17 SHA-256: 42e25d2ac688613497ed65e394a6d1ff2b5cf4692412f29a14e7bc2257470ec0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic for SEO poisoning or distributing malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9938

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 http://candemdientu.com/Images_upload/files/daverogaj.pdf In PDF document text
- http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614ad67b6c2cf---delolomax.pdfIn PDF document text
- https://nolimitscenter.be/peausitive/images/FCKeditor/file/guzetefasevosafukim.pdfIn PDF document text
- https://cyberbirddog.com/userfiles/files/gatureg.pdfIn PDF document text
- https://xaydungdonggia.com/app/webroot/files/images/pages/files/5052169243.pdfIn PDF document text
- http://msiutilities.biz/documents/gumusi.pdfIn PDF document text
- http://veszpremkosar.hu/_user/file/97045320548.pdfIn PDF document text
- https://koncnc.com/genelresimler/file/vokafurodewowakovejol.pdfIn PDF document text
- https://alariel.be/userfiles/file/sowumaravatoditir.pdfIn PDF document text
- http://incomsistema.ru/ckfinder/userfiles/files/nakugisujekudegigituzu.pdfIn PDF document text
- https://bodegoncriollo.com/userfiles/file/45612287552.pdfIn PDF document text
- https://dudikom.pl/userfiles/file/2352449911.pdfIn PDF document text
- http://cppzone.ru/users/blogs/file/66052515882.pdfIn PDF document text
- http://opt-russtd.ru/data_center/upload_pictures/file/walavenikelaparodin.pdfIn PDF document text
- https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/zosodemaj.pdfIn PDF document text
- http://eurekaelearning.com/upload/news/file/lutinuxolosoniv.pdfIn PDF document text
- http://clinicaveterinariabilancino.it/userfiles/files/maxekotaparij.pdfIn PDF document text
- https://hijaulumut.com/contents/files/26199917174.pdfIn PDF document text
- https://cambodiaangkorhomestay.com/userfiles/file/mopadawasewubaw.pdfIn PDF document text
- http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/84590128013.pdfIn PDF document text
- https://alperbehang.nl/userfiles/file/gurimivamo.pdfIn PDF document text
- http://fertilityupdates.com/userfiles/files/53904766148.pdfIn PDF document text
- http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161325618bacbe---rifijis.pdfIn PDF document text
- http://mya1fc.com/files/ckuploads/files/vesaxubalate.pdfIn PDF document text
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea94e829fe---pitomujolobulogajal.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=amazon+mod+apkPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c5e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC5E1	1820 bytes
SHA-256: `ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c`
`font_01_sfnt_off0000ce6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE6C	10048 bytes
SHA-256: `41f1c55f105e118a5ffcae38104d47c727913214f450702e23f113dc0fc58604`
`font_02_sfnt_off0000e4bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4BD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off0000fccf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCCF	22740 bytes
SHA-256: `0f3f601e9eed4dee597d91376c7d90fbf9bfcc2cc72ee517d365a64a453994a6`

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