Malicious PDF — malware analysis report

Static analysis result for SHA-256 abdea2e7a4badcb1…

MALICIOUS

PDF

67.8 KB Created: 2020-12-01 12:02:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d3fa1a87b28484f83780b091315d4b84 SHA-1: 5ce09a6f8ec636149b5cf5bbe3d284a736d845ee SHA-256: abdea2e7a4badcb153a1439285c037afb29fd8a6a4b299c8f6d25b69e0e5033c
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body appears to be malformed or obfuscated, but the presence of numerous external links suggests a phishing or spam campaign aimed at directing users to potentially harmful websites.

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://traffking.ru/aws?utm_term=naruto+blazing+ninja+road+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421970/normal_5f9bb50b58870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_5f8835cc9fd33.pdfIn PDF document text
    • https://satotujum.weebly.com/uploads/1/3/4/3/134308249/losevifesusikuw_ligalix_vofuredoren_nopiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_5faeb8984fde4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcee7300f7af3919d20cfe/1606217333464/dr_ho_cleanse_reviews.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e1448ef7301f8b1097bc/t/5fc17aa43570fb44d13abad2/1606515364949/90129803676.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1619768612547ed61873d/t/5fc2fdf35147b1480495cd18/1606614515982/cells_vocabulary_quiz_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75dfd3b8-25d0-4125-a546-8a2dfd6e9de1/google_fi_referral_program.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd2a26f50b7c006c784b1d/1606232615443/desirees_baby_espaol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0cfeedabee7b44097af3/1606225151422/ob_gyn_intern_survival_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a925946a-ecf4-435b-8161-de335fde4e83/automatic_call_recorder_pro_5.58_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf683961e25426e130fd50/1606379579076/steroid_and_peptide_hormones_biology_discussion.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffc42bda9c57a97b92422/t/5fc1bff13485235c8607de3b/1606533106238/riccar_sewing_machine_model_555su.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_off0000ccea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEA 5052 bytes
SHA-256: b39119413636839d708ff08367c2db9e72a0db38bf611c1257c7faf86a553135
font_01_sfnt_off0000de31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE31 10992 bytes
SHA-256: b1277fa02d1a1f4907006eff53ca730e8c68d7845a2aa0ab2f77dd08fb8d774c

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