PDF malware analysis — malicious · e682bb71912a7017

MALICIOUS

PDF

73.1 KB Created: 2021-09-02 20:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 3572d38e9eae1ef3a4911de84aca0238 SHA-1: adf60acce6af9962aaace342aa64d6e498de3381 SHA-256: e682bb71912a70172a2d2165bbb1805cff0d0678e155d4e88ed5b4947acc348e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9849

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://snsi.jp/image/news_file/jonuziriseramo.pdf In PDF document text
- http://praguetransfer.com/files/file/sapetonedivesuremosule.pdfIn PDF document text
- https://wonwon.taipei/photo/file/bubivem.pdfIn PDF document text
- http://good163.cn/Uploadfiles/files/subupumivuwinujinagom.pdfIn PDF document text
- https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071e7abc810b---nodil.pdfIn PDF document text
- https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a233e556ce6---10929945080.pdfIn PDF document text
- http://burattinojatek.hu/userfiles/file/5929401041.pdfIn PDF document text
- https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757ef28c404---jatawelenudujoka.pdfIn PDF document text
- https://yingzhaoliuart.com/upload/file/4588419415.pdfIn PDF document text
- http://quanhoangtsi.com/upload/quangtri/files/wojenafejemeja.pdfIn PDF document text
- http://arredamentoambienti.it/img/file/31688701585.pdfIn PDF document text
- http://abington1964.com/clients/865474/File/49828594490.pdfIn PDF document text
- http://badaranquehablar.com/userfiles/files/27939584415.pdfIn PDF document text
- http://pc-driver.ru/userfiles/files/dareguwamejuderun.pdfIn PDF document text
- http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/5e683fc09f03d350e52d5d8764482b01/vapofokamo.pdfIn PDF document text
- http://ketphatthinh.vn/upload/files/nigadifosibopotigozuf.pdfIn PDF document text
- http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/d6ac54156113781e16fa6424340dbb7d/90633530101.pdfIn PDF document text
- https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/6dca296878d073fb21337a58bc360752/7484658467.pdfIn PDF document text
- https://xn--80aesyq.xn--p1ai/files/file/13785677274.pdfIn PDF document text
- http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075389c5c00b---79707429885.pdfIn PDF document text
- https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/158a97976eba58ec9d00959d24d7bd5a/wujumivuzapilubeguped.pdfIn PDF document text
- https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/n9h4oeimoklbtcbl6lqbjprjsh/nimizawudonukovafatel.pdfIn PDF document text
- http://dinskayarealty.ru/media/file/81630326710.pdfIn PDF document text
- http://nc-israel.ru/upload/files/suwewita.pdfIn PDF document text
- http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607073384b1c8---33248846683.pdfIn PDF document text
- https://alakharia.com/public_html/userfiles/file/87887066790.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=maneb+2018+results+msce+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_off0000ba0b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBA0B	11304 bytes
SHA-256: `515080ac8c87b12ce86b8c98a2414d2b573dd184d80c68402f89c0b38a010df9`
`font_01_sfnt_off0000d483.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD483	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000ec95.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC95	15980 bytes
SHA-256: `31db76ab225d9b566346ee6c7880aaa1e82bba8022aac4aa24caf736814063b5`

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