PDF malware analysis — malicious · a63ea2cdbd0f3791

MALICIOUS

PDF

100.4 KB Created: 2021-09-04 21:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: af8153468f5f2955aa53af2f4fa8a4f3 SHA-1: cdd8836370e2e0e596ca6311fc9a83990bd194f8 SHA-256: a63ea2cdbd0f37913182170956abdfcedd9c25ffd82ae4b35f809e0430b124be

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially compromised websites and link farms, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content are consistent with attempts to disguise malicious links or exploit vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 0.9961

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://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/b970deacf8bed036d5f0b0538f3e163b/28270603489.pdf In PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/f91512c281d6803cb43f4aa177654c2d/gatesunulevijemotopojog.pdfIn PDF document text
- https://papiratisk.cz/soubory/tivikemupuxoxiju.pdfIn PDF document text
- http://autosoftware.company/autoresponders_images/files/murejuvixubaf.pdfIn PDF document text
- http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77e0d3e33d---zaribomezalekaxomodon.pdfIn PDF document text
- http://tiwtactic.com/userfiles/files/povewupesatagamutim.pdfIn PDF document text
- https://ivanamihic.com/files/zumudufudud.pdfIn PDF document text
- https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/3f23156c89aa23443c933fb20266ded0/7433232552.pdfIn PDF document text
- http://www.anclupnapoli.it/userfiles/file/80623550379.pdfIn PDF document text
- http://alkanboya.com/files/file///danederetoluxu.pdfIn PDF document text
- http://vbs.pl/dat//file/meduvabapuwizedenok.pdfIn PDF document text
- https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16084f9347b2ef---6935201564.pdfIn PDF document text
- https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/d3a65f55a221a7432ef96ba9b59b8d3c/76375009025.pdfIn PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f4f207bb75e---14118208943.pdfIn PDF document text
- http://diamant-x.sk/UserFiles/file/fatamojuxiwekob.pdfIn PDF document text
- http://www.aqsclimited.com/EditorImages/file/vufaxixalopevodomup.pdfIn PDF document text
- https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/a6835a461aeaa01f3c172fccecb498b0/desepuvasobemifigenafevop.pdfIn PDF document text
- http://rancholasmonturaspremios.com/campannas/file/nobemopu.pdfIn PDF document text
- http://sb-78.ru/files/file/liwejarizobetoziv.pdfIn PDF document text
- http://tfh-filter.hu/_user/file/14364792394.pdfIn PDF document text
- http://sanarina.de/ckfinder/userfiles/files/30208874893.pdfIn PDF document text
- http://www.alcera.ca/userfiles/file/41413267594.pdfIn PDF document text
- http://ippinnudon.com/uploads/files/runer.pdfIn PDF document text
- https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/igqj0frlivml0c0503bfh6k1vh/14429679868.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=real+estate+agent+job+description+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_off00012324.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12324	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00013b3b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B3B	11108 bytes
SHA-256: `cb1267b56fbeba6ea8f1e31bc52f5438d6a2bea7ecf9fe65d13f901d6cad4858`
`font_02_sfnt_off000154d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x154D0	17972 bytes
SHA-256: `0fdf6c27a6e00d0ea300a18068b573569a6dc8baa4bc3b8031e52fa50a78ea8c`

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