PDF malware analysis — malicious · 2e5b757ee2814db9

MALICIOUS

PDF

84.5 KB Created: 2021-05-08 23:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 7489aa35a5ec4e91b8a731b9cb51fd13 SHA-1: 30f49a8bf95c38a4d1bced1a193cc3d3d699d054 SHA-256: 2e5b757ee2814db9d53a7932b5e2676484bf4d2d7869684d2149b543b313c9d0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, directing users to download potentially malicious applications. The heuristics indicate a high concentration of links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://synerhu.ru/uplcv?utm_term=descargar+hungry+shark+evolution+apkpure PDF link annotation
- http://harasim.cz/uploaded/files/natotubuwu.pdfIn PDF document text
- https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c80347be58---doxew.pdfIn PDF document text
- https://agatanorek.com/files/file/36884283899.pdfIn PDF document text
- https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/qbbbvc702aiv9og3aeqpeto0pf/solabizebitikulufanodelat.pdfIn PDF document text
- https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6b4f0ec73---vixetonepeg.pdfIn PDF document text
- https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/6c26cc5d1effd248e31af7a6471b00c6/3345449257.pdfIn PDF document text
- https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/sprn4tpbail2rsp6inf3dli1tb/11142520267.pdfIn PDF document text
- http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077a0f5d1bd4---10079843492.pdfIn PDF document text
- https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/ec355843e8e2143345df5e6bd3c63b97/2908425536.pdfIn PDF document text
- http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/c62d7f214765f315cae09dc1ab7fea7c/gepesaxizagerunuk.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf3db6d438---48293121317.pdfIn PDF document text
- http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729fa2cd4b1---jafiz.pdfIn PDF document text
- https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/8o68mir0n19h8l9hg5p2qn0b2t/5055372019.pdfIn PDF document text
- https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/6f418c1e87ead38d76121ea88c4507fd/losul.pdfIn PDF document text
- http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940cb25ba67---wegedamevudulolotelilelor.pdfIn PDF document text
- https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607160c1d45e2---vixisezirut.pdfIn PDF document text
- http://www.awakohchang.com/image/upload/File/okovixiginufegek.pdfIn PDF document text
- https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/4067754f98c867929cc289a67ac1c480/90497834253.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c4336b769---ropijanunerok.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000dbf1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBF1	5016 bytes
SHA-256: `d6bbc3a17586eb7273645c2987f4e2066cc02679c5d6b50004f27a54fba090c3`
`font_01_sfnt_off0000ed89.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED89	5420 bytes
SHA-256: `ac78a64191abe215226e341a1c4418febd43d44eaa86e33ac0d2da1299bfdc90`
`font_02_sfnt_off0001000b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1000B	18884 bytes
SHA-256: `0f085759102e825105057e3755fac992b622cb7ced2124cc976dd5ccc66b1322`
`font_03_sfnt_off00013127.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13127	16528 bytes
SHA-256: `8472b310bfbd54f5eba60016d3e856e0f663ee973de991391c4d052507e955b5`

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