PDF malware analysis — malicious · 6c021e4ffac9c38e

MALICIOUS

PDF

86.5 KB Created: 2021-06-28 23:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 5707188b9baeb5ced04c7d4c80638946 SHA-1: 73783984c52f3d517d81ee67ff6c4bf392027d2c SHA-256: 6c021e4ffac9c38e1abeb7bc1f9dcf9bd6edad14c4ff7ef393eb897cbaa6d8f1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm used for phishing or malware distribution. The embedded URLs, such as 'https://garglob.ru/uplcv?utm_term=gasoline+fuel+injection+system+pdf', are likely used to redirect users to malicious content. No scripts were extracted, but the overall structure and URL patterns indicate a phishing or malware delivery attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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 https://garglob.ru/uplcv?utm_term=gasoline+fuel+injection+system+pdf PDF link annotation
- http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b95a0443e73---wokakesab.pdfIn PDF document text
- https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/e9e69c866c2ae25cd0599f128ba6c692/95945834777.pdfIn PDF document text
- https://loctra.net/userfiles/file/wotidelukutopakejum.pdfIn PDF document text
- https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe4711f745---xevate.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9a3db986c---87440373718.pdfIn PDF document text
- https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/68u49p61mia5nllp9jalu7gk85/pexizedof.pdfIn PDF document text
- http://jatyn.cn/upfiles/202105/file/1620905867.pdfIn PDF document text
- http://nacyc.jp/Upload/file/33999991121.pdfIn PDF document text
- http://wallsfamilyreunion.com/clients/876683/File/46972140419.pdfIn PDF document text
- http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2466c079b---87852902944.pdfIn PDF document text
- http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/91914881484.pdfIn PDF document text
- http://snsi.jp/image/news_file/fudabevojukolonen.pdfIn PDF document text
- http://texmet.pl/userimages/file/5398761690.pdfIn PDF document text
- https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/9dd9dcf51c9f427ffa8119325074863e/93248295394.pdfIn PDF document text
- https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887fdf7591f---fumugawajasenusiwiwor.pdfIn PDF document text
- http://igabana.com/upfolder/e/files/20210617184924.pdfIn PDF document text
- https://keluargamimpi2.com/contents//files/75235848894.pdfIn PDF document text
- https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/ddbd4713c80c9852059f065632bc0493/99596438138.pdfIn PDF document text
- https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607af91635bbd---38713239368.pdfIn PDF document text
- https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/6qg7b1u1h84flpsiebqs07rr74/5422238590.pdfIn PDF document text
- http://doks-films.com/pcms/content/file/39156951482.pdfIn PDF document text
- http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/77077263932.pdfIn PDF document text
- https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/0ark5fc56u015pn6idmj1gqojq/pufeno.pdfIn PDF document text
- https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/u6ibl7of3296o361bd0s8n8j27/kufofojugetarone.pdfIn 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://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_off0000ef2c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF2C	16720 bytes
SHA-256: `6237d03ebed05acd72f4debd25850b0bb9f90ed1b19aa5a28eb419c9c74439bd`
`font_01_sfnt_off00011ae6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11AE6	11064 bytes
SHA-256: `0f4fa32cabce71c953a143243c5d6da577b042d584d9131542999c7243b5a3a2`
`font_02_sfnt_off000134ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x134AB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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