PDF malware analysis — malicious · d98ef542a0d8c040

MALICIOUS

PDF

87.6 KB Created: 2021-06-14 20:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: b24cef47f2a06a9e5421f901a439219a SHA-1: aff5ecd0717cc4264237069575e6db65a54f4bf7 SHA-256: d98ef542a0d8c040ebb6aa79161052dbef509a5f141d7f7aaf4bdcd1e6648f61

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The document body's content is minimal and appears to be obfuscated or corrupted.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://coretry.ru/uplcv?utm_term=alif+lam+mim+surah+baqarah PDF link annotation
- https://pjkconstruction.ca/images/file/6915029103.pdfIn PDF document text
- https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/932d600673dd50153c999849d355caaa/58790779044.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7169b5400---ferowozuzoxagusopekipepox.pdfIn PDF document text
- http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba876e60f---kikivuzelu.pdfIn PDF document text
- http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3cccce741b---62387085389.pdfIn PDF document text
- https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/3e415c17b0062f98ab74695bc649577d/daxalekire.pdfIn PDF document text
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a02dfe710e---zolibakiwuguve.pdfIn PDF document text
- https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/1f206eddc8d8a4765762b076a627f3f2/66892407710.pdfIn PDF document text
- https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/bc94b16278c1c8d68995b81ca3a941d4/83056373506.pdfIn PDF document text
- https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/550144ecaa3a29771ba8bc94f2bc8025/52668957842.pdfIn PDF document text
- https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a8abf4ab730---melelogivivafat.pdfIn PDF document text
- https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/40e8b44d3c7be0781047f3c08db22642/91285389679.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/c1d47d935d9aeb972fd80e51a04bbaa8/nijowijizizufotesa.pdfIn PDF document text
- https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070eba870413---tidelelofenure.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607905c33ae14---13544632773.pdfIn PDF document text
- http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/s0dn7to7165u1a68du0ivlb140/52823598285.pdfIn PDF document text
- https://cihangirhotel.com/upload/ckfinder/files/690251576.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010f6e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F6E	4732 bytes
SHA-256: `d7d6b378f9d0e6d2434e193d5e9b34430675c8c8c6a83a67b307f368be62bb74`
`font_01_sfnt_off00011f6b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11F6B	10648 bytes
SHA-256: `824f305b7e6cc6e33aaaf683a85449c415b76bc0187e66cd5d51d554b8cf6ed7`
`font_02_sfnt_off0001439a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1439A	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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