PDF malware analysis — malicious · 3b7dbcb1a20f9730

MALICIOUS

PDF

83.1 KB Created: 2021-06-04 12:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 707c966ed570ecc0519c6188256204e3 SHA-1: e0f0df5aa51da4c0e789c3c9c4c0fb3ebb569180 SHA-256: 3b7dbcb1a20f9730bb27b5402e882fa5e4058ff321ea80d75675981b68a27986

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is classified as malicious, containing a large number of external links disguised as maze printables. The PDF_SEO_LINK_FARM heuristic indicates a link farm designed to manipulate search engine results, and the ML classifier strongly flags it as malicious. The embedded URLs likely lead to phishing sites or further malware distribution, aligning with a spearphishing attachment attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
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.
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://pixomot.ru/pbw?utm_term=laberintos+dificiles+para+adultos+para+imprimir+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4454813/normal_603be7e4d7519.pdfIn PDF document text
- https://tedaliduvif.weebly.com/uploads/1/3/5/9/135957254/vexesamaluv_perejijise_soforilu_pupep.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388285/normal_602f973aab870.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392442/normal_604ecac7b9d87.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403282/normal_603b85d937731.pdfIn PDF document text
- https://pilinosaw.weebly.com/uploads/1/3/4/8/134852056/fdf51039.pdfIn PDF document text
- https://povilaromegew.weebly.com/uploads/1/3/4/4/134486615/1347851.pdfIn PDF document text
- https://pufotawimudob.weebly.com/uploads/1/3/4/3/134380049/tebozu_gumadud_resorub.pdfIn PDF document text
- https://tisirobe.weebly.com/uploads/1/3/4/6/134699904/390645.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465128/normal_6018e926d1b6f.pdfIn PDF document text
- https://botekajerojaj.weebly.com/uploads/1/3/4/7/134749353/5cf722212f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380068/normal_6064320803c74.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4444869/normal_606a09c2c29fd.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4374181/normal_5ff6941e8e6e4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450154/normal_603a2beddf5b2.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://nebapelamive.pbworks.com/w/file/fetch/144538092/youve_got_a_friend_in_me_chords_piano_easy.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/48840b91-c04c-48bc-a797-0cb1f1f250ce/realidades_2_capitulo_1b-6_answers_page_23.pdfIn PDF document text
- http://mumasenekera.pbworks.com/f/40223575052.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3d9005f4-f7ec-43fe-b407-f466e8fb5d5f/what_is_direct_linear_plot.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_off0000f90a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF90A	2952 bytes
SHA-256: `013fc9f45313cdddd5762e6694753e55f6a85ad2eec225b6e17fd140af1ee5c7`
`font_01_sfnt_off00010399.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10399	5384 bytes
SHA-256: `4ccb4b6d7b82fddde159a46fbec4b66d117573cdfc158dd24afd48732ea0a3fd`
`font_02_sfnt_off000115cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x115CB	11908 bytes
SHA-256: `25551fbb58eec4020ce86be155a2739a740205afa9f97012956da8521229748e`

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