Malicious PDF — malware analysis report

Static analysis result for SHA-256 783ea9691d8d2732…

MALICIOUS

PDF

35.3 KB Created: 2020-11-03 11:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 742f279540ccea03216605245131d105 SHA-1: 26a2d9fe751a3cf0fe9c912f2bcaac5ecc786d84 SHA-256: 783ea9691d8d273298ccc41640c7649bf5322c386217479efe950fce8ecef90b
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/aws?keyword=shrine+of+saint+joseph+stirling+nj In PDF document text
    • https://pativezakuzorad.weebly.com/uploads/1/3/4/2/134266084/b97e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414847/normal_5f962ab6d3dd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426263/normal_5f9e03117eba0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374188/normal_5f8956ea8bdd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392854/normal_5f912d978bf4d.pdfIn PDF document text
    • https://kotugupevexaxis.weebly.com/uploads/1/3/4/4/134493549/7118580.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/00a315296502ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411229/normal_5f937a433eefc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/banijugoniragom/true_to_the_game_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/keep_wifi_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/acuerdo_de_paris_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/16066682073.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_off00004b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B4C 5340 bytes
SHA-256: c90adef5c44116e462b871f050f92a6ecf1d1226e2a98bd739d9636aba82d6ae
font_01_sfnt_off00005d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7B 10424 bytes
SHA-256: 0cc265a243b1a0862b1e6d2f9af132af0ea4f204247776b66258be59c8e9868a

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