PDF malware analysis — malicious · aea93d927f3d23e2

MALICIOUS

PDF

89.8 KB Created: 2021-06-28 03:24:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 219d7b806b69d3e17d81a09d8a0c50df SHA-1: 6810bc5b2f9185202d98d6a09cc6c5ed618d31cd SHA-256: aea93d927f3d23e266542fce60f472ad7d7488cb03c318131cdf184fde9fc55f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting domains. The embedded URLs suggest an attempt to redirect users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9765

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=how+many+sides+does+a+pentagon+and+hexagon+have PDF link annotation
- http://digifast.cz/userfiles/72257239514.pdfIn PDF document text
- https://777mto.com/contents//files/73785016855.pdfIn PDF document text
- https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca26289bcc---suxuxemulab.pdfIn PDF document text
- https://balticstroy.com/uploads/files/juximirozuvaburevuguwip.pdfIn PDF document text
- https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/251eba8df611b1479632c81877abb0b7/xalejero.pdfIn PDF document text
- https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/49e8333f17851215e8e2eb806f1e1a6a/goxurezonurisirogonasuwow.pdfIn PDF document text
- http://normel.org/files/upload/file/lesubawuwizaxata.pdfIn PDF document text
- https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16091311d09e4e---66665795967.pdfIn PDF document text
- https://gregor-biffiger.ch/userfiles/file/lubarinat.pdfIn PDF document text
- https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/3dac14d825c53cb99a4c2d843f143da0/sekexadalawejavesefo.pdfIn PDF document text
- http://hy-concrete.ru/d/files/lagizanekuparokudapu.pdfIn PDF document text
- http://ilturismoinitalia.it/userfiles/files/xobolago.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abba2245889---2571161978.pdfIn PDF document text
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608714009d45f---27978913839.pdfIn PDF document text
- http://baigeleather.com/userfiles/file/dakub.pdfIn PDF document text
- https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/44sa9frspof2grsdtg5fsub210/30224264185.pdfIn PDF document text
- https://parklanehotel.asia/userfiles/file/26719188164.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1d2a65ac3---tupupijiguvolugozesade.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087af01736a8---18777934013.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/98u7ua2bf75k0hls8k7t5mdf91/47649055781.pdfIn PDF document text
- http://ipceurope.eu/assets/file/begofojikoraxekewofutotez.pdfIn PDF document text
- http://tasteofruraleurope.eu/upload/File/xudowojatoxodasiwi.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/62d806d1ac63c5cc414ac4e82efd682f/85823653341.pdfIn PDF document text
- https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/oeqvjdds0c42l6lgtv0q24gbgb/61465191794.pdfIn PDF document text
- https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/7112171d68700bd9eed0d03f53885008/novezonuxutina.pdfIn PDF document text
- http://irk-yoga.ru/upload/files/63478341614.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e106.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE106	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f91d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF91D	11052 bytes
SHA-256: `960f1d1a83e95e53fdf00c39a944451a6abbe52fb7afc307cafe1c6404b448e5`
`font_02_sfnt_off00011280.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11280	17960 bytes
SHA-256: `d5af044810f4c1e43d043d65c373c8f4803c26291361aac0074019bdc5747324`
`font_03_sfnt_off00014108.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14108	16252 bytes
SHA-256: `bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4`

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