Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8139bb35545c2c…

MALICIOUS

PDF

44.4 KB Created: 2020-10-15 15:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b4d59ad28eec43efdb280006cdb5f987 SHA-1: 1b47ce7c859fdb020e7f00efd2b27d3e6cbe6596 SHA-256: 6d8139bb35545c2c0721315f0125cca28174e6f3b67c7c549119dbcbf12d3ba7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated and contains the malicious URL, suggesting an attempt to lure users to malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/wb?keyword=trigger%20finger%20exercises%20pictures In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f875c0b5ddd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f87528cb0819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f86f8d7dd3a2.pdfIn PDF document text
    • https://berajuvexoru.weebly.com/uploads/1/3/1/8/131860787/9706216.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/delelides_dasexurekiwar_jajumab.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/jivemurajipu.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/24d7341b-6f91-488c-a7cd-e75020924eeb/mapozurepeloxuguk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17436bd3-d26d-436b-b1ae-dc30c22ed22d/12511590970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89a7718a-47dc-46d9-bed8-41acf8b52a3c/dipatakixobunegudosijedor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b883616f-821c-4d59-9da9-98642dad0240/sumaderalufilidenunefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dfe5aae-7e3e-46e7-a08b-935066579a03/3418144501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42465fc4-e963-4790-aed9-b4d241cae518/78312911800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f9b111f-eb22-41ce-a828-408d30d1d93d/vavuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c9b19bc-9df4-4083-a7f4-f9486fcc61b2/41932472787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e064075-438a-4011-8e12-d1b9a165a190/kugevigixozase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf29bd8-569c-45bd-aa78-8c980e6da755/zijikufikuvajit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45dba03d-d778-4c8b-9040-d8f8b0d10134/xabuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a53dfa5b-a33b-4794-a784-3899f7ed6766/liwogazisawavujobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e17338d4-cf70-45e2-8586-231893653554/82230520891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3cc32bb-46e0-4c16-92a1-1572c0b159dc/22533383720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/948b8820-b4d1-4d36-9898-7694c06ffe6a/84414268673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6c9cd9b-43f6-4828-ae12-85e070e5d1e5/jiwokigifirikuzitava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/876b2715-3ef1-4085-be56-68765e403f37/5244320079.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E2 4956 bytes
SHA-256: ce86b6c26062aedfd5ae4e7b42dfe59c4e0c5c1aff3a44424ef82a13b8a171bb
font_01_sfnt_off000081e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E2 10116 bytes
SHA-256: e1921b89f8fc340e3cb77a043483977300a7df778081018492ae8124b0fd35a2

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