PDF malware analysis — malicious · 6e366402a817ecca

MALICIOUS

PDF

85.2 KB Created: 2021-07-24 06:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 8d70775a17520ab0897f042ef9584f55 SHA-1: 4103408c6fa1ca9ce52b27c1439b9a9b2ef358b3 SHA-256: 6e366402a817ecca23564a05e12f2b9152bd13dc878282427f0f67825f1b8ea9

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-severity PDF_RANDOM_URL_LINK and ML_NYX_PDF_MALICIOUS. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The ClamAV detection further confirms its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9957

Heuristics 7

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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://xboxheerlen.nl/userfiles/file/64887308494.pdf In PDF document text
- https://daxitrip.com/basefile/daxitripcom/files/30810194859.pdfIn PDF document text
- http://malagi.pl/user-files/fck/file/wepuxukaza.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe85233875---25682862226.pdfIn PDF document text
- https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2098b44f0---88658505390.pdfIn PDF document text
- http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c937c15ad68---47162456993.pdfIn PDF document text
- http://fitnessklub-impuls.pl/uploads/assets/file/7152553148.pdfIn PDF document text
- https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/5elg4icm2s3afmrkp0ubnbuv8b/32000910931.pdfIn PDF document text
- http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/24279552738.pdfIn PDF document text
- http://proxima-design.cz/files/file/3413831153.pdfIn PDF document text
- http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/8c9f9273b5288c9f9724c5d365f5833a/54622929000.pdfIn PDF document text
- http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/fkaj6u1hm2hbp122p14hu31487/vukajememagivig.pdfIn PDF document text
- http://standardamulet.com/files/files/gesarodifa.pdfIn PDF document text
- https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/du59emmgehnuf29f2guog38p64/74703824530.pdfIn PDF document text
- https://weddingitaly.jp/images/file/libajepivoso.pdfIn PDF document text
- http://agcslohian.com/userfiles/file/gurivegariwipazo.pdfIn PDF document text
- https://kueapem.com/contents//files/16354296221.pdfIn PDF document text
- http://cuacuonanbinh.com/userfiles/file/1647009941.pdfIn PDF document text
- https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/01e879f19f76879f4e2d4193383c6d56/nerozosidigizedamemozudux.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e01acbb73b---beriva.pdfIn PDF document text
- https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/61ee732a4306328787a256cc047d2fd7/xefivesor.pdfIn PDF document text
- http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/l9dooqeq7e2uqhsv0arfp4d1s0/54944008103.pdfIn PDF document text
- https://unique.global/wp-content/plugins/super-forms/uploads/php/files/520aec227c332b57cda564f6c5abda55/36125291422.pdfIn PDF document text
- http://mariautonoleggiomarsala.it/userfiles/files/66666504363.pdfIn PDF document text
- https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4b69bcbf9---91493629067.pdfIn PDF document text
- http://aksaaydinlatma.com/img/editor/image/file/zofovilutuvixosixuxarupa.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=gangstar+vegas+apk+data+offline+highly+compressedPDF 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_off0000e4a8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4A8	11380 bytes
SHA-256: `c4dea47a88c6347f45d8bc097ef37e4cb58b1e4189551d2461e15a73dbf8d3be`
`font_01_sfnt_off0000ff24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF24	18864 bytes
SHA-256: `a3cc38f3d6e61acff492d713f75867f9995ee4c2fe83ce7d99575c263363baf1`
`font_02_sfnt_off00012de9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12DE9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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