Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ceb0a9a0922f5da…

MALICIOUS

PDF

77.7 KB Created: 2021-01-05 06:43:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a4f54c5cc98e2ffab5130394c7bc53da SHA-1: 71c4c1b4988045e0f5d4cad8552cd2e75a03011e SHA-256: 1ceb0a9a0922f5daedc910bcd61e086d21f79238b28ea6261d30a652bf98162d
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=crystal+report+runtime+version+10.+5'. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=crystal+report+runtime+version+10.+5 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419826/normal_5fabcdc61fe10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455670/normal_5fb5e20c98965.pdfIn PDF document text
    • https://cdn.sqhk.co/vixivizal/ifijUgi/tinkle_definition_synonym.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470019/normal_5fa70afb84d2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5f89e2636f221.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422144/normal_5f9795961956d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408865/normal_5fea3e24029a6.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/vuxalirudidel/manual_reparacion_calefont_splendid_ionizado.pdfIn PDF document text
    • https://s3.amazonaws.com/luresimosip/free_printable_pocket_first_aid_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/10371667365.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/free_energy_pogil_packet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/guided_reading_mesopotamia_lesson_2_mesopotamian_empires.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/bharat_songs_free_320kbps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53cf2395-a69a-4bf4-9025-edd439afb574/5258198422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49678956-d1b0-4f7b-a11c-8b0415ce133c/bubipefulikigugerap.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_off0000e155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE155 6476 bytes
SHA-256: 526c5a2175551476bef9e67e23fc16d118bda5f5d89964818a68e3a853678add
font_01_sfnt_off0000f15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15C 5380 bytes
SHA-256: 600ec9e0eb35e62d578acd99c9e6cbd2fcd287d97e7fcd6f355a64b599dd3c92
font_02_sfnt_off000103a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A7 10936 bytes
SHA-256: 0a968b7e47d76d55b065ca539df208b66ffb11bb5e237d5f0ecace6d65d49d12

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