Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82fb1c171226ff3…

MALICIOUS

PDF

111.7 KB Created: 2021-01-01 02:13:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 895b02c28445774aad244d4e77ca0010 SHA-1: 84a1322c117b3593be1c6df52c97d9ebea56a167 SHA-256: e82fb1c171226ff3c65a29a1fc70d32054194854869c4c03fe42daafea22c332
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to be a lure related to 'Skyrim special edition mod install order', suggesting a phishing or scam attempt. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to potentially malicious or low-reputation sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=skyrim+special+edition+mod+install+order In PDF document text
    • https://xifugewelude.weebly.com/uploads/1/3/4/3/134353264/bfe6bfa1ad.pdfIn PDF document text
    • https://momaramurelu.weebly.com/uploads/1/3/4/3/134309976/4159986.pdfIn PDF document text
    • https://kavirozix.weebly.com/uploads/1/3/3/9/133999962/38aa5f5afb.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/Jj3jiPn/45732382341.pdfIn PDF document text
    • https://xivamiwilazux.weebly.com/uploads/1/3/4/7/134742933/883771.pdfIn PDF document text
    • https://gidixelasulam.weebly.com/uploads/1/3/0/7/130739099/viwuzusosekojeviwito.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/136e10d1-0ad1-48a4-880a-b1701e4016ef/29085851919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39882adc-8f55-4e24-a839-0b7a418caddc/fire_emblem_three_houses_dimitri_tea_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18fa2a2c-56a1-4f65-929b-708be3cac897/fabukesisujobez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e5945b0-7b57-431a-8194-5ac73f5fc897/worksheet_14c_solving_linear_systems_of_equations_addition_elimination_method_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2200faa-c7f5-48d3-a14e-3bea2c939d02/carrie_underwood_newest_song_2020.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16817 6408 bytes
SHA-256: 6a8c9ad7cf6b07f54ff1f01958f9cae9e7ef9a5bad321c64439d747038ebeec3
font_01_sfnt_off000177e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177E2 5488 bytes
SHA-256: a96b4a02a3325759d549cfaa9869e14ea6b53606d36c5edecf498dc60646779f
font_02_sfnt_off00018a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A82 11304 bytes
SHA-256: 0c3d6edb0245d3785f1052be63e65e131f1cc860020e7ccac33671ca1c1e1510

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