PDF malware analysis — malicious · ea49d7652f152856

MALICIOUS

PDF

90.2 KB Created: 2021-07-03 13:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 4ceb9a9504ed501e7b4baedb6292a044 SHA-1: 142d00440ff2deea1e8948461c818eb94d728ab7 SHA-256: ea49d7652f1528569b988e6771d1cdb80241dae0e71e23c0cdf63c097eb7f47e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive or infect users.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://allytemp.ru/uplcv?utm_term=electric+field+on+the+axis+of+a+uniformly+charged+ring PDF link annotation
- https://area34.info/wp-content/plugins/super-forms/uploads/php/files/kv5bavre7hb9t8du0miduug0m2/romevenekufaxexer.pdfIn PDF document text
- https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/l76d7gv2asrqmmchst4oct2881/7845835159.pdfIn PDF document text
- https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f5ec28aeae2176635709f9b7c34f4e46/watijanetepi.pdfIn PDF document text
- http://automsystem.com/UploadFile/file/20210626143106985.pdfIn PDF document text
- https://agatanorek.com/files/file/23625135743.pdfIn PDF document text
- https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/bg6tjr6fhaki5d17eml0mle5t3/3930926958.pdfIn PDF document text
- http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2d7e7fda4---gelatuxij.pdfIn PDF document text
- https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/549e44514fd6fd94e723980932c74a42/88759678149.pdfIn PDF document text
- http://webursitet.org/Files/file/23806957269.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/82335e643b5ff25d5d6a526e43a93e39/sidutipekaxes.pdfIn PDF document text
- https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607451fd523bb---dagidafekabawanowova.pdfIn PDF document text
- https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a181dace2---37941419121.pdfIn PDF document text
- http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609c23f5acdb5---mimidar.pdfIn PDF document text
- http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aacd9e82aa---keliduledafoxugazemojot.pdfIn PDF document text
- http://acmemask.com/upfiles/editor/files/ruteko.pdfIn PDF document text
- http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3602d8a6c---86731725044.pdfIn PDF document text
- https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/90447bc423ec677b6719a62ef8bcdd25/wisaluzozom.pdfIn PDF document text
- http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/ffa11fa8a5fc628101741793f434af20/vumimafudapefal.pdfIn PDF document text
- http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0777e92314---83602769431.pdfIn PDF document text
- http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4537cae62---kibunatavano.pdfIn PDF document text
- https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d3967b53012---xodetewobesudotikojeji.pdfIn PDF document text
- http://humanlitech.com/files/files/32857532560.pdfIn PDF document text
- https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/152e6279e7342717db86194498a50bd6/sovibijujutazizirunu.pdfIn PDF document text
- http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/3e3fd42dcb5c13ea5bb4f8c75715254e/kenekanenufuxaduta.pdfIn PDF document text
- https://doanhnghiepvietnam.org/img_duhoc/files/buwotuwexibironuj.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_off0000f89a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF89A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000110b1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x110B1	11220 bytes
SHA-256: `52c316abcd853e6d3f923678cdd289f05d2cf022aae7b7f586e1cf6503d9acc4`
`font_02_sfnt_off00012a97.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12A97	18496 bytes
SHA-256: `90374408b5af83eb376d2ebacab06dc581a8b21f8a8bc2d4a511d110a67b05ae`

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