PDF malware analysis — malicious · 2b4c3cff33c824f0

MALICIOUS

PDF

82.9 KB Created: 2021-03-08 13:08:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: 2c16e0ff7276d10323c704343b4c9ee1 SHA-1: 0abc9be7ab37c157f73a67743e49308bd560dd7b SHA-256: 2b4c3cff33c824f087499bbb30fa6afdeae3f96889926603c1b835efd8cb7481

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to app downloads, reinforcing the lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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 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://jumiwimov.ru/wix?keyword=muffin+knight+apk+ios PDF link annotation
- http://xazamobi.66ghz.com/keysight_oscilloscope_programming_guide.pdfIn PDF document text
- http://mukanoderike.iblogger.org/xobeje.pdfIn PDF document text
- http://doniposebuk.iblogger.org/1494945888.pdfIn PDF document text
- http://tujofifebituxuv.22web.org/acc_guidelines_hypertension_2018.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417834/normal_5fd1d57ca3467.pdfIn PDF document text
- https://cdn.sqhk.co/metexemoraga/UhiDRB8/teppanyaki_menu_lehi.pdfIn PDF document text
- http://gezinuloxi.22web.org/latex_title_page_master_thesis_template.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476782/normal_601f0501c129e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379487/normal_5fdf147f27694.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4477916/normal_6036c1d69a61f.pdfIn PDF document text
- https://cdn.sqhk.co/lalivaga/jSBjghN/24168752006.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_e7be0bb09e99420ab6a7b5e296727ad0.pdf?index=trueIn PDF document text
- http://botozagelexi.rf.gd/38822591979.pdfIn PDF document text
- http://kikexufan.epizy.com/42062382433.pdfIn PDF document text
- http://jusudab.epizy.com/bios_lenovo_g50.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/39221af0-7806-46a1-b304-c9bbf4b0757b/vimazowevamafo.pdfIn PDF document text
- http://bubewap.rf.gd/battle_realm_free_pc.pdfIn PDF document text
- https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_2449c3b70590450b91c99bf543a01442.pdf?index=trueIn PDF document text
- https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_c8fb2f7c366640a5838b3370f55834b7.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/dbd3f5bb-02ac-43d3-b51a-6d3ad5cd7893/breville_juice_fountain_cold_press_review.pdfIn PDF document text
- https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_b2233a6066fb48d9a34dd8a5b303253b.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/f50efcb0-03d3-48db-ab0b-64aff15498b6/starting_your_own_clothing_line_online.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
- 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_off0000f146.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF146	5104 bytes
SHA-256: `a24d47e6c19fbf7a4a115c3bdba566c0090e6e30626b0175ecb8c1ba0bd1789c`
`font_01_sfnt_off000102bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102BF	10896 bytes
SHA-256: `fb74a50ee228bb408b7345fd2b5169e30e61fdb118fbe7b310cfcc00f18560d9`
`font_02_sfnt_off00012840.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12840	16324 bytes
SHA-256: `33efa7d3c359547f7e17feae102126c955946ab809e09b52566390182cf39dac`

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