Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d562a3ccd2765f…

MALICIOUS

PDF

54.1 KB Created: 2020-10-03 20:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fc25651160365fec0b23f7e8da5f7495 SHA-1: ac8518ab3174d63634326590b689170b18add9b8 SHA-256: d8d562a3ccd2765fce8970776d4a1cc9f43699c0d78565dc361f6a0add274d72
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, indicating a phishing or redirection attempt. The ML classifier also flagged this PDF with high confidence. The embedded links are designed to lure users to malicious infrastructure, likely for further exploitation or credential harvesting.

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/pify?keyword=.220+swift+sniper+rifle In PDF document text
    • http://vepar.seedtothenations.com/uploads/1/3/0/7/130738950/vadetewagapora_dabit.pdfIn PDF document text
    • http://files.grittyfaith.net/uploads/1/3/1/4/131438282/a7c37.pdfIn PDF document text
    • http://vizaw.amarisspa.com/uploads/1/3/0/8/130814328/8771896.pdfIn PDF document text
    • http://files.gailyountsartwork.com/uploads/1/3/0/7/130776343/gewesiwo_niwenixom.pdfIn PDF document text
    • https://site-1038890.mozfiles.com/files/1038890/nasedax.pdfIn PDF document text
    • https://site-1040681.mozfiles.com/files/1040681/29319134961.pdfIn PDF document text
    • https://site-1036702.mozfiles.com/files/1036702/85505281813.pdfIn PDF document text
    • https://site-1042106.mozfiles.com/files/1042106/vuvuzopowotazeb.pdfIn PDF document text
    • https://site-1038499.mozfiles.com/files/1038499/xigowuz.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/1/0435/8835/4211/files/figadataxonigakibofemomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7582/4544/files/alien_trilogy_ps1_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9670/5691/files/angle_of_attack_indicator_garmin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f48e789-8931-40cd-b76c-90b69819bc2f/zedadujokoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b07fa2e2-9aa0-4b74-bb0e-76b6cdf62c83/98032168672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd633810-fb9b-49e1-baaf-02338e5f0905/risisi.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.

FilenameKindSourceSize
font_00_sfnt_off000078fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78FA 4988 bytes
SHA-256: 3c99a8e099bc166bd8b0409b1ae66891a759774b3d546b1178289cefb4a0e02b
font_01_sfnt_off00008a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A21 14136 bytes
SHA-256: 6472b1b4adf60d530f4caddc9145fe26ce72f211b74e31643dcd255766354a1e
font_02_sfnt_off0000b6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D5 16060 bytes
SHA-256: 2d958bd008b8db5b33092f112e99c856adbcc0a100e950d14ff814b784be6357

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