PDF malware analysis — malicious · 2cbd473e7e2f7d0f

MALICIOUS

PDF

81.4 KB Created: 2021-09-19 06:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 94f184f200d84d1157b2d0e7b1211fa8 SHA-1: 0f2bdf0549591caf445dbd697dea1a6f4e22a99b SHA-256: 2cbd473e7e2f7d0faaf2fff42bd8285ac477e6853f29ef4ba04cfbc1abbb3059

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with multiple URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The embedded URLs and the overall structure indicate an effort to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://fields-on-earth.com/images/blog/file/gipiviwikosepufilape.pdf In PDF document text
- http://jsdarvin.com/files/80599037604.pdfIn PDF document text
- http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/0aaffbfaa64bf6f66afcc0c3b3d03a38/kokipibozefi.pdfIn PDF document text
- https://essaidafm.com/uploads/FCK_files/file/96052644171.pdfIn PDF document text
- http://getdol.com/page_data/file/ratidulemuletisaposonegow.pdfIn PDF document text
- https://master.plus/wp-content/plugins/super-forms/uploads/php/files/e13f3dd4ae103824e623446afe0128ee/22298497561.pdfIn PDF document text
- http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/75209445702.pdfIn PDF document text
- https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/161468823d93cd---33516271665.pdfIn PDF document text
- https://rarahil.org.np/ckfinder/userfiles/files/62465230282.pdfIn PDF document text
- https://cv-vezouze.fr/media/file/sigedugevedif.pdfIn PDF document text
- https://eminentland.com/admin/userfiles/files/zurukaretisotemiruvazit.pdfIn PDF document text
- https://2winit.com/Files/files/57585718731.pdfIn PDF document text
- https://mami-m.com/Uploads/userfiles/files/gowizege.pdfIn PDF document text
- http://mkconline.com/landmark/ckfinder/userfiles/files/losezabiperugopawozal.pdfIn PDF document text
- http://sarigol.kr/userData/ebizro_board/file/pinexunokiwaviwawizaveke.pdfIn PDF document text
- http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210902125201.pdfIn PDF document text
- http://allseasonsart.com/uploads/fck_uploads/file/kozabadanudutawob.pdfIn PDF document text
- https://promise-land.com/upload/file/84137597473.pdfIn PDF document text
- http://lonniestireandauto.com/nbloom/fckuploads/file/18726592460.pdfIn PDF document text
- http://savemaxint.com/files/file/jopapotaxaniwox.pdfIn PDF document text
- https://rsun.pro/admin/ckfinder/userfiles/files/nuxomiwegafudodakebasij.pdfIn PDF document text
- http://kammerchor-lindau.com/file/23013319292.pdfIn PDF document text
- http://iiiemjobs.com/FCK_Editor_Images/files/witurabukasovawoxijizo.pdfIn PDF document text
- https://www.stnedu.com/ckfinder/upload/files/9418201095.pdfIn PDF document text
- https://holocaustresearch.pl/nowy/photo/file/21314581201.pdfIn PDF document text
- https://termofriz.rs/files/puvawo.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=android+beam+downloadPDF 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_off0000daf5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDAF5	10352 bytes
SHA-256: `3b3680480137c478f486d711eab1a34c692c19d2db213498bd2337ffc50d128b`
`font_01_sfnt_off0000f24d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF24D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010a5f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A5F	17344 bytes
SHA-256: `0dc08c686e12e9d3435413850139e354b934f64909097f5a9e2828c3f5c96fea`

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