Malicious PDF — malware analysis report

Static analysis result for SHA-256 383c2c7fce454af8…

MALICIOUS

PDF

49.0 KB Created: 2020-11-09 07:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 85e1066bc630c771920b5d1c56e3a4a4 SHA-1: 06ad7354988dc99a61353056e34145ce8f033296 SHA-256: 383c2c7fce454af8e458440f58d107170a7face887b9b2e3a155a02c01e3bd6d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, disguised as a free technical certification PDF. The document body itself contains obfuscated text and the malicious URL, indicating an attempt to trick the user into navigating to a harmful site. The ML classifier strongly supports the malicious verdict.

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://cctraff.ru/123?keyword=vceplus+70-741+pdf+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411918/normal_5f94d1ecc7ecf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406213/normal_5fa0720161e58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_5f87835e46fd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413457/normal_5f9713b1660c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_5f9d8975d7172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5f906becb4b34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://selogum.files.wordpress.com/2020/11/fixorabiza.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/79726736626.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/94004561287.pdfIn PDF document text
    • https://tenuxenoboge.files.wordpress.com/2020/11/ropavo.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/35268501735.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/gts_hacked_pokemon_sun_and_moon.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/pafifajikuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1082a38c-614b-46e1-86b2-d27a83e98fd5/amsco_chapter_14_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/ziwazukarikuv.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7429 4836 bytes
SHA-256: 6bf31994c363d7acc50ae19acb56e744593b281e239d3fa080fd85058eae2cef
font_01_sfnt_off000084b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B8 10672 bytes
SHA-256: 9c78a8a27c313927c24c3ffe72fdeb40db7e342a1cc34cac999aca9b4cb46670
font_02_sfnt_off0000a8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8E5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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