PDF malware analysis — malicious · 2c74ca3dfe5ce25c

MALICIOUS

PDF

84.0 KB Created: 2021-07-30 07:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: 383aa898df5feee2fb2418fe7141fb12 SHA-1: bcf099af44c7f15071fae53bb75c1200ee6bc7e6 SHA-256: 2c74ca3dfe5ce25cd32a9fe054643949a1f7ddb20ede5943b82d82550163b90f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics point to the PDF being a link farm, directing users to compromised or disposable hosting sites. The presence of numerous unknown URLs suggests an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://bertoniamministrazione.it/bertoni/public/file/sawarojunalegejuduzonov.pdf In PDF document text
- https://feldmann-spedition.de/pics/userfiles/file/movajatejugofevezum.pdfIn PDF document text
- https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c50529d5489---jibagebep.pdfIn PDF document text
- http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00d2ba2a0e---falozibe.pdfIn PDF document text
- https://himalayanthailand.com/image/upload/File/18807076188.pdfIn PDF document text
- http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607109f2563bf---japerurol.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/4049370712.pdfIn PDF document text
- https://shoreluxurylimos.com/userfiles/files/nanexujivevut.pdfIn PDF document text
- http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c15961827d2---4547218479.pdfIn PDF document text
- http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd68a0c9dbc---tilodepixirapuzi.pdfIn PDF document text
- https://ljlconst.com/admin/images/file/80070935131.pdfIn PDF document text
- http://rszm88.com/upfolder/e/files/20210530015555.pdfIn PDF document text
- https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/d04aad7c165422cd3c845aea1667fc09/4930618448.pdfIn PDF document text
- https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/46fd263acf06faf0a63b628b03462705/xiwebofotesotatesapoje.pdfIn PDF document text
- https://mygo.com/ckfinder/userfiles/files/67718942390.pdfIn PDF document text
- http://bostonmentors.com/userfiles/file/32472595633.pdfIn PDF document text
- http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d22fcfe971f---kofukavekasefupurozazajo.pdfIn PDF document text
- http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/4bfd67230d63644d4551c664e64cd346/lilawexulix.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/de754a861430b5c3622cd7ad6a9da9c4/67805271029.pdfIn PDF document text
- http://eia-edu.com/userfiles/file/zobipawa.pdfIn PDF document text
- http://myphamlulanjina.com/upload/files/77427140987.pdfIn PDF document text
- https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/c387594a67e07cc479245400a3b5b5fe/98177366482.pdfIn PDF document text
- http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c38d0b133a0---64011349731.pdfIn PDF document text
- http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/j7e6em577d46t998ng1u17d061/55472966368.pdfIn PDF document text
- http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2fe17779c---nesonudezoda.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=a+guide+to+automation+body+of+knowledge+pdf+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_off0000e0d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0D6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f8ed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8ED	11088 bytes
SHA-256: `a6edd482025415eea2b98c6334f3cb1f07017844945d39e12f0b98270c2f8597`
`font_02_sfnt_off0001126a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1126A	18184 bytes
SHA-256: `92a97c13a200bc8f7c59845c67512b5ff48ffdfd7f8657efb10f28cb2b82b246`

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