Malicious PDF — malware analysis report

Static analysis result for SHA-256 87de528cc192d3ec…

MALICIOUS

PDF

71.0 KB Created: 2020-12-23 09:58:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: ab9711d0ff6c86b115f6249c24f6ba68 SHA-1: 0841e7876a071a0198961f6005788d860460c637 SHA-256: 87de528cc192d3ecfc508ce634fa84acf88f3378415d95667a965bc4b953a58e
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 'traffking.ru'. 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://traffking.ru/aws?utm_term=lagu+bunga+citra+lestari+terbaik In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f9389e825320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415321/normal_5fa398997e4ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kavitokolezub/lego_at-_at_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/honeywell_t6_smart_thermostat_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/88274061336.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/85465521758.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/38920582556.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/55372771995.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ce745e8e827d429a49c0/t/5fce091e0ab5d62feb18bdcc/1607338270888/sevifezuf.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/excel_freeze_sheet_position.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/fosaresod.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/minion_banana_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df212495-e469-408b-a785-db6bb70ba496/lewejunulodetumok.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/lolovaperuzatuvotiruz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb92c42b-755e-44fd-9b27-6201f7236fc9/l4d_pingtool_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61fb243a-ccf7-40f0-bb96-881ec00a1e17/83963556399.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6A 4884 bytes
SHA-256: d86f7bf7a03020e5513a97b9750288df0488e5b22b68e7ed6b9f78b9650af90a
font_01_sfnt_off0000de19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE19 10156 bytes
SHA-256: 3dd0e728056c3b1037ed29c8ff3493cdd4df799a88ae79071bbed82c66639256
font_02_sfnt_off0001009d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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