Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa056bfcd4e836c…

MALICIOUS

PDF

48.7 KB Created: 2020-10-07 01:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4ba6f0a06677af2ee3ffad3e63e3fd7e SHA-1: ebe927de95151a73c9aee48cf7f6b4c42b672c59 SHA-256: 7fa056bfcd4e836c227a2e4a13c64651acf7b46ad229272eb2dbd100b62ed019
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'Empaque y embalaje definicion' and a URL that is also flagged as a malicious redirector. This suggests the document's primary purpose is to trick users into visiting malicious sites, likely 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 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.
  • 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/strik?keyword=empaque+y+embalaje+definicion In PDF document text
    • http://xumep.anthonyphillips.com/uploads/1/3/1/6/131637372/tagupuredat.pdfIn PDF document text
    • http://files.ncbbq4u.com/uploads/1/3/0/9/130969931/2175973.pdfIn PDF document text
    • http://kefamuki.rochonsandshall.com/uploads/1/3/1/4/131453741/ca53205da3dbfc.pdfIn PDF document text
    • https://site-1036898.mozfiles.com/files/1036898/vutepejigajasaxopagus.pdfIn PDF document text
    • https://site-1036786.mozfiles.com/files/1036786/sunivalitoviv.pdfIn PDF document text
    • https://site-1036716.mozfiles.com/files/1036716/88917926750.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3623/5160/files/8079260037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/strongman_vs_bodybuilder_vs_powerlifter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1904/2457/files/romikuparazilejimuneb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a52760-8e8e-4e2f-b2a7-096b02dbfb52/24411222029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32604c20-5dbc-452e-ad6d-1ec47d775865/zelawidiviribuxotivejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a9e64ab-e896-4ab2-b89a-420afa9826a9/42425990281.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFA 5428 bytes
SHA-256: d0e5104b1e846150db77bcaeb1a42bfdaf54530c16e147637caa14125d813f1f
font_01_sfnt_off00006e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E64 4532 bytes
SHA-256: a7a788d406a07778fec6b3b37dc267eb2cbf354a12d54c1a45e84b7b92b97ab4
font_02_sfnt_off00007af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF3 10856 bytes
SHA-256: 6930a26b7bf741b302146c80c15b9aecced0b0f8d3af6474bd6c2930cf77645e
font_03_sfnt_off00009e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E4D 16336 bytes
SHA-256: e06fba4164ac16c165214f5f4232651daafdc404a58c7e7d1ab12f636b0c6cc1

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