PDF malware analysis — malicious · 5e413202bd0d7837

MALICIOUS

PDF

94.9 KB Created: 2021-04-03 05:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28

MD5: f686958cd93394b33b375ccdd53b28a3 SHA-1: 78547f85f0b3242a879cb4f22ae2ccc5c7b8953e SHA-256: 5e413202bd0d78374fe0cea74371ebdea927b640d68dcff65f833ce8c40c3b76

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains heuristics indicating it is a link farm and has been flagged as malicious by ML classifiers and ClamAV. The embedded URL `https://soxebez.ru/wix?keyword=arithmetic+and+geometric+sequences+word+problems+with+answers` suggests a lure to a website that likely hosts malicious content or further redirects. The PDF structure and the presence of numerous external links point towards a phishing or redirection scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://soxebez.ru/wix?keyword=arithmetic+and+geometric+sequences+word+problems+with+answers PDF link annotation
- https://static.s123-cdn-static.com/uploads/4388820/normal_5ff7935039055.pdfIn PDF document text
- https://gokejubekilebu.weebly.com/uploads/1/3/4/3/134376129/4811663.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4497369/normal_5ffb5003d88d5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418993/normal_605885df3d3a5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450041/normal_6026a1996eab7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370077/normal_5fdb56f708324.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368998/normal_6037b3f8b0e3a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4367947/normal_5fde24c9669d5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4377408/normal_6010f84c1634e.pdfIn PDF document text
- https://kuburabet.weebly.com/uploads/1/3/4/3/134362545/jugeg.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4473638/normal_5fe39465cc24a.pdfIn PDF document text
- https://rutizinudepedo.weebly.com/uploads/1/3/4/4/134483735/9538845.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417426/normal_6003b5288270d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4486213/normal_603feb3017fa9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387938/normal_603bfbc3312f2.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/00aa9db4-e675-4d43-b6a1-e39aece6bd7c/xolilez.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f94402f8-99d0-4972-8ec4-9024e3283f2c/lord_of_the_rings_pc_game_download_full_version.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/20575d09-3d2a-46db-ae02-8cb21e1cb6ca/lenuxamivegizinabilelox.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/73f3f1f2-77b5-4729-9f8f-ac65fad9983c/how_to_connect_bluetooth_to_golds_gym_treadmill.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6459b81a-5487-4258-8d4a-9b15139794c7/ergobaby_omni_mesh_carrier.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/daccb2c9-72e1-4896-91ee-d25ccf8dd4c3/32286255688.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cd44dfa0-4485-4ac9-83e7-bd15d6922c35/84170698979.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00012b4e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B4E	2828 bytes
SHA-256: `4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9`
`font_01_sfnt_off00013549.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13549	5832 bytes
SHA-256: `d3b41a77ef37ae9594a10a91d967d49180eaf55cec666dd5969f4195ccc2018d`
`font_02_sfnt_off00014900.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14900	10668 bytes
SHA-256: `41821b8459f660790c311d907c7c7c974c39f6bfaeb8e9a46cdc8170b78aa5f7`

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