Malicious PDF — malware analysis report

Static analysis result for SHA-256 365533f9f889a8f5…

MALICIOUS

PDF

65.0 KB Created: 2020-12-17 06:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2ecb3643d493e1434f867655ccf6f136 SHA-1: c390f824cc82b71da5bfe7b4fc8fb3c8edb797a9 SHA-256: 365533f9f889a8f5ef4ace1257f96917af7e933f28615fbb9acfe98552b58933
214 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing or redirector campaign. It contains a significant number of embedded URLs, with one identified as a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Gettysburg address worksheet answer key' to entice users to click on the malicious links. The presence of a link farm further supports the malicious intent to direct users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/aws?utm_term=gettysburg+address+worksheet+answer+key In PDF document text
    • https://dobamadolexazi.weebly.com/uploads/1/3/4/4/134478964/jejejasi_jejuvosumag_jukonusirago.pdfIn PDF document text
    • https://biwurozijusuxux.weebly.com/uploads/1/3/4/7/134724143/visonutimuzo.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/deruramewobutevitaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448549/normal_5fb5cce80cf79.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/henghuili-files2/briggs_and_stratton_500_series_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/zusufol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c85f8deb-f23b-4a96-a9ce-0fb2f8b13647/wakavoxakosomigoren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4835ab-61b5-46c7-92ab-cdaad6f30719/manukixetoxireg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c323e61-1646-498d-b226-c3456096d360/merifudiguvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f08638-7eb9-4c45-9508-6a2f29da3391/buminelonafujeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/540bd2f9-3a59-4bf2-bd95-79a6c7486089/23808888993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/956111e9-c4f4-46a6-aea1-f78c4a91f525/26799721676.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_off0000c147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC147 5484 bytes
SHA-256: ad208156d412d5b0ef40c2b8c041ee122889c3483947d20c859cc3470ecd78f0
font_01_sfnt_off0000d400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD400 10384 bytes
SHA-256: 604fcf7c2eca2ce02a3a281f025fe6c1b16b32067c84bd34918421ce7e063dd4

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