Malicious PDF — malware analysis report

Static analysis result for SHA-256 6561cd33405cc28e…

MALICIOUS

PDF

69.1 KB Created: 2020-11-22 20:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0308517349937c3f198b9061d924124b SHA-1: b00994c44bd8a81986a18587327bad9d3ada73a3 SHA-256: 6561cd33405cc28ef11724fb2594d5f4170cde1b8ae1c8ac68c50250a7c6af98
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/aws?utm_term=lg+vrf+air+conditioning+system+pdf'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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?utm_term=lg+vrf+air+conditioning+system+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5fa1fdb174025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384817/normal_5f8d8589d26ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409396/normal_5faa2dcfc7622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458826/normal_5fa951204aad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420238/normal_5fb6eed131eae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449600/normal_5f9df9ee960e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388052/normal_5fa31680ea469.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/ninazarila/garorozexekudufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d250cbfe-f4f0-4c89-9200-3ec404048178/boxovotozuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87057a10-90bb-4e26-917d-691af6439f61/viwavisumomijowawuzowiw.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/effective_java_4th_edition_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47fa933a-9795-4395-83a4-1acc55f9a3b5/tenewejixoduwusixin.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/dagofebokulesogo.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/biteborirituvukudivuk.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/52151433429.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_off0000d2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DC 5544 bytes
SHA-256: 562b27f75d0305f10e59dd5ba0fb7f8fc550a70bda5fd3f9573517f06ca4f2be
font_01_sfnt_off0000e5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B9 9904 bytes
SHA-256: 83e4ef31ecc5dcf7d3612c374dbf09b11043323994ef63d06de1299706d63fba

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