PDF malware analysis — malicious · 24cc42ec4b0da007

MALICIOUS

PDF

83.2 KB Created: 2021-09-03 08:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: a8ec987f912be965865383fd168bf254 SHA-1: 7e6ff9bd12abe6c8ba0756ae629c1fef9d72dfe0 SHA-256: 24cc42ec4b0da007dc1cdede927f761a36150106fcc56ba0604c0b5819035e6c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised CMS upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious sites. No scripts were extracted, but the overall structure and URL patterns strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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://hitourkorea.com/FileData/ckfinder/files/20210714_7245139619D99957.pdf In PDF document text
- https://sabagdasarov.ru/upload/file/70350892686.pdfIn PDF document text
- http://cmtsport.com/pliki/nujirerizajoluwofanarat.pdfIn PDF document text
- https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/mss0k1fphk04aqemluh571m26j/15799773939.pdfIn PDF document text
- https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/88173b54626bb5552dcd1206921adc1b/4587259119.pdfIn PDF document text
- https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/cj6j988i4ugcpdc0r47ehscima/poteresosowoped.pdfIn PDF document text
- http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701b9d31a88---dowoxapavikub.pdfIn PDF document text
- http://beergolfers.com/blog/images/file/9862222831.pdfIn PDF document text
- https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/60d90450bd9b53bdcce53e63e52df350/13915976298.pdfIn PDF document text
- http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160addeaa70408---67782265518.pdfIn PDF document text
- https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/455ef64f4e8cbb3818cfcaa657130c54/95733726781.pdfIn PDF document text
- http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4db5a4678---bewuxanuwewipotomat.pdfIn PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/8e1cb91f03db7066777c40ca417920ef/45839153975.pdfIn PDF document text
- https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/hgjjjttqmsm7t72p6tuvdedj2n/42067077025.pdfIn PDF document text
- http://mazraeir.com/images/upload/files/kumem.pdfIn PDF document text
- https://angkagenap.com/contents/files/derodobereropa.pdfIn PDF document text
- http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/ca9987412b9787f80d092ff5a59e46f4/27438644808.pdfIn PDF document text
- http://ecohost.ru/pics/images/file/nibalelakalatefiwewubedu.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160fe3cf1bf140---5972519009.pdfIn PDF document text
- http://www.abcklima.hu//data/editorfile/9056306081.pdfIn PDF document text
- http://interface-referencement.com/userfiles/file/bukebanuwujunibunevezod.pdfIn PDF document text
- http://sictombbi.fr/ckfinder/userfiles/files/10798724783.pdfIn PDF document text
- http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/d94c89794b4222c2363198b503433a52/93083630270.pdfIn PDF document text
- https://camping-du-lac-dijon.com/fichiers/wejigodamutawajafovo.pdfIn PDF document text
- http://ranagro.com/files/koxulugiv.pdfIn PDF document text
- https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e55476fee6---35929389125.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=wood%27s+upright+freezer+manualPDF 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_off0000db2b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB2B	11132 bytes
SHA-256: `b0bcf341c504381f16e941940803321a837f7bce99a1cbd0692304c999f14de2`
`font_01_sfnt_off0000f4d8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4D8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010cea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CEA	18248 bytes
SHA-256: `47503a2ccb3ba117e8929265ac61d9ea09ff6f83d9500e851e72898fa3dfe9e4`

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