PDF malware analysis — malicious · e363f96e5e83f645

MALICIOUS

PDF

81.9 KB Created: 2021-07-19 12:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 992c4c4c3fdf067ee35f6accc88dfd06 SHA-1: aa1baf2bb5331d476e02a044398eaa016de0791a SHA-256: e363f96e5e83f645d8225500bdab3b2e0a3dfa3e8f3627bfac5d3cf424ce472b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other potentially malicious sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links strongly suggests a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9933

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://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f8d25f0b2---12900509481.pdf In PDF document text
- http://jp-photo.cz/soubory/files/jikewozefulotugesa.pdfIn PDF document text
- http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a45a953fb6---28626040829.pdfIn PDF document text
- http://amexeuro.com/an3_Uploads/file/2699512558.pdfIn PDF document text
- https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/285fca7113e4e276866d28fedc7a822a/pamupusigijawadojel.pdfIn PDF document text
- http://htwy.com/upload/file/90985774379.pdfIn PDF document text
- http://marymo.ru/uploads/files/vijufonivofuwubetubizo.pdfIn PDF document text
- http://whatdwellswithin.com/file/20045454119.pdfIn PDF document text
- http://tamlaproject.com/userData/board/file/93843176619.pdfIn PDF document text
- https://bestofbucerias.com/upload/file/45394415456.pdfIn PDF document text
- http://kondicionery-dolgoprudny.ru/upload_picture/file/45359853222.pdfIn PDF document text
- http://apsons.eu/files/file/34346066747.pdfIn PDF document text
- https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/a91f482a18e75cd57a1e058da8c4770c/gubazaxikoxuxuxi.pdfIn PDF document text
- http://penzionklara.cz/userfiles/file/55587979243.pdfIn PDF document text
- http://taxicityplus.ru/userfiles/file/folujutugurasajujominuz.pdfIn PDF document text
- https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/19840452d0f1218cfbef540d83c79ea1/20247067996.pdfIn PDF document text
- http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7454d0e58b---33422260565.pdfIn PDF document text
- https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/c5f0431e302aee501ba89aea793ec6d0/85162221351.pdfIn PDF document text
- https://dolupin.com/calisma2/files/uploads/fixibibidudo.pdfIn PDF document text
- https://tlproduct.com/userfiles/file/dikulifasavegitilafifiwo.pdfIn PDF document text
- http://yngc.ru/admin/ckfinder/userfiles/files/76798881888.pdfIn PDF document text
- http://macabrey-luthier.fr/data/Files/30545672951.pdfIn PDF document text
- https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082971b94c2d---33646935173.pdfIn PDF document text
- https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071007709769---rejosabegudinoralawobe.pdfIn PDF document text
- https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/f0640bd644b1db439089347586311342/korenama.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=dr+frederick+shiehPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c7cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC7CC	10136 bytes
SHA-256: `d9477a319280fdb8dfcaee6b2e2305396fc32255106868ec07aea88840eecc78`
`font_01_sfnt_off0000de89.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE89	17060 bytes
SHA-256: `f1ee167b1bcfaaed893cd7882b08362c83139e61d014c530ce632e33abd58591`
`font_02_sfnt_off00010b37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B37	16120 bytes
SHA-256: `09562ca2d5000ae2f2345c4ffb282664df80e6add20478162cc85c395b82892d`
`font_03_sfnt_off0001208f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1208F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.