Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4369b7140ae6f15…

MALICIOUS

PDF

42.3 KB Created: 2020-10-13 04:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0165d3394fd1605e09dbe539b70a823d SHA-1: de1eddd0d688a05681398387517e37e8599b1f4e SHA-256: b4369b7140ae6f15d350b61d1b56cc5cf38c5c1403e1748f10ce098b0425bded
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by a machine learning classifier and contains a link to a known malicious redirector infrastructure. The embedded URL likely serves as a lure to direct the user to a malicious website for phishing or malware delivery. No scripts were extracted, but the presence of a malicious redirector strongly suggests a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ggtraff.ru/strik?keyword=hora+santa+por+la+paz+2020+pdf In PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/zifegedimuvekolup.pdfIn PDF document text
    • https://site-1036695.mozfiles.com/files/1036695/menepowipazitevo.pdfIn PDF document text
    • https://site-1044256.mozfiles.com/files/1044256/xapajuvuvojaduleziga.pdfIn PDF document text
    • https://site-1040612.mozfiles.com/files/1040612/46032581217.pdfIn PDF document text
    • https://site-1038946.mozfiles.com/files/1038946/81954480861.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/d0a73789-710b-4d4e-a341-17106fc387d2/notazovovizunusemepobis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b68fad07-f16e-4e18-b5e1-f8f488a9ea46/80460031375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa349785-7142-4f7c-8c4d-0003b9f60e6b/59240309307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34338acf-d4ad-4614-8742-c452ed8e0266/92192295362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/705b74e4-5ea3-413f-8650-c1700edf35b1/97140718435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8327/0818/files/marble_launcher_projectile_lab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/91590417127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/45933251126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8738/9087/files/best_class_path_of_exile_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0659/0119/files/70177953260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7154/1926/files/4116001386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9967/5547/files/football_heads_2014.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EB 5320 bytes
SHA-256: 5f38035a98b226e22a3f45e57a0c76b224ee9480493e6f3889e033b75c202238
font_01_sfnt_off00007c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0F 11216 bytes
SHA-256: c563151c3c8b60b4f8bb8f5c83ea7db04cef35786d15b6772f6fcf839e8a219a

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