Malicious PDF — malware analysis report

Static analysis result for SHA-256 5841549327812d06…

MALICIOUS

PDF

73.0 KB Created: 2020-12-19 17:35:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ea58d47fa88ac21d37f48fb568a69f58 SHA-1: ab2b56974ee9b042be9cc8e30f5c04df652f58b5 SHA-256: 5841549327812d06fe77a7ee4f5c678052af787908cea822a8ec6407675d425e
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and an ML classifier, indicating a phishing or trojan threat. It contains numerous embedded links, including one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to 'Animal Crossing New Leaf guide', suggesting a targeted phishing attempt. The presence of many external PDF links also indicates a link farm, likely for SEO poisoning or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=animal+crossing+new.+leaf+guide In PDF document text
    • https://vitukotegow.weebly.com/uploads/1/3/0/7/130775282/433a53a444e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412174/normal_5f9de19d10c4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378621/normal_5f8fc2a66f86b.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/wemuxozazel_bekeluzolemoj_wumedi_xofavuxaguvobu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413017/normal_5fc2d5ed69fc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374979/normal_5f8a0bf1b71a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412905/normal_5fce7dc5143bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411489/normal_5fcf5c6730b47.pdfIn PDF document text
    • https://jebapawobukil.weebly.com/uploads/1/3/4/5/134521284/livovo-zodamivumakaxur.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/jifesu/asme_y14_5m_1994_standard_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b3865fa98a681f101f83/t/5fd003e66742965a9def9428/1607468006953/bobuguba.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/name_an_outdated_form_of_communication.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37f170b6b03258f45d436/t/5fcb2a057ab0f364aba7f191/1607150085750/notification_sounds_not_working_on_note_10.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/max_bernier_platform.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_off0000e1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DE 5452 bytes
SHA-256: fba3332c12d0f4dbbbde2dabc7c0e5c57bd2735a6b4907673b057a02af163e41
font_01_sfnt_off0000f45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45F 10420 bytes
SHA-256: e77480b2723f3a025d923765bffbfeb11e577ac62753d7d597ecc7208495a667

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