Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7bba7dac7a182ba…

MALICIOUS

PDF

68.4 KB Created: 2020-12-22 19:39:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 07168c3edfb72c5b568b8bab8526e956 SHA-1: 223b33243ab3f6db524088e267597eb0c55ef047 SHA-256: a7bba7dac7a182baec849412e50114ef3ebbd50ff721b7a17b7f1cb79671a851
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafftec.ru', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to dog cakes, suggesting a lure to entice users to click the malicious link.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/strik?utm_term=healthy+homemade+cake+for+dogs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448986/normal_5fbb214754989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409238/normal_5fb03574ea9d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380701/normal_5fb2cd9630dc9.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/5fc52e42104edf1d779d00d0/t/5fcad353a51c5a14019c7f72/1607127893957/jojezokatuso.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc389629955c744b54c2322/t/5fd0593db8bf0379e6086748/1607489863087/tiboma.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58676affbf90a6609dc37/t/5fca75068aff060d4dcd24ce/1607103750164/vusefufevenalasu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f6bd5687f52b6b817d01/t/5fc1adab4e98326c024f7153/1606528427703/peoples_history_of_the_united_states.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/698ea5f1-8dbf-41c2-b6f1-5a7f34cbc140/ribefewidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453d321c-e3ba-4f2a-b810-4dd5a0eb804a/jeffrey_jerome_cohens_7_monster_theses.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f6c4e5c7695ca99bf722/t/5fc139cc3485235c86f3897a/1606498766809/43537235400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0001744f-f849-40ef-b998-a8cf5717a68f/pivajuravopokepafuruzawe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66b26c30a162e0c7861d2/t/5fc6e5edb2fa4660c8c47cb0/1606870510067/funny_text_message_tones_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29042d26ff1194f7e5c4d/t/5fcf51060496d067bdd0641b/1607422215982/horizon_forbidden_west_ps4_pre_order.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77b14579eee3ae06e022d/t/5fccfc0d978da30c56ffa67e/1607269392159/mebukamajidanituj.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_off0000ccf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF4 5564 bytes
SHA-256: efd7ad0310da143ffca68b4b1cc9c00dd3ded1a05ea7a9a8568290b00f8df4b3
font_01_sfnt_off0000dfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB9 10844 bytes
SHA-256: e26f212d7bae877879afa21f56640c3277a90850f88513a2457bad4ae756d97a

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