Malicious PDF — malware analysis report

Static analysis result for SHA-256 b986dc4c09930c21…

MALICIOUS

PDF

75.8 KB Created: 2020-12-20 19:12:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 96f67d8b100f006dca71889f25ded5c9 SHA-1: 952a478a6243ad787b343ff16fc4d273fe6fbf16 SHA-256: b986dc4c09930c21fa65baca7a70113c813f902e13be7eefe75f66d93f49f42b
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URL points to known malicious infrastructure, suggesting an attempt to lure users to a phishing or malware-hosting site. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://gettraff.ru/123?utm_term=salt+and+sanctuary+classes+reddit In PDF document text
    • https://sitizoxibe.weebly.com/uploads/1/3/4/3/134317871/a5e8a0d.pdfIn PDF document text
    • https://sukuvigu.weebly.com/uploads/1/3/4/2/134236057/e2f7ad1.pdfIn PDF document text
    • https://zoliparudoluja.weebly.com/uploads/1/3/4/6/134662317/4381960.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://uploads.strikinglycdn.com/files/1475ee8f-7028-4a00-b59d-e96d98755ea0/gear_template_generator_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a56f6b97992eb57bf598/t/5fd6b86e313c42342b9ab735/1607907439163/majora_s_mask_3d_strategy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8fbaac6-98ee-4101-9aab-c8950de23acb/minecraft_pocket_edition_apk_1.11.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b973717a0f60c4053b44/t/5fd68fd696ed101a3e47e2e6/1607897053083/75637605335.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2c445b7bc966055df433/t/5fdd5a132da99c2868046baa/1608342052529/action_words_verbs_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd45c3eb685147a09c264a/t/5fde64677185ee572d46b5cc/1608410216315/mitosis_and_meiosis_test_questions_and_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdf476f169c3718384eb6c/t/5fd0d23f3bcf75077a8bb0ab/1607520832434/xmeye_manual_add.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db89b85c-5664-4b3e-a598-ceaedf3bf041/bosch_brute_jackhammer_handle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e944133-0bb2-4243-b662-2b0e300cf8c1/zoganaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28e00bf3-ff4c-4fb2-b403-5530b9e2c361/luloz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/477a0dd5-4a2b-4808-ab15-d9b538a7e6e7/zevikozeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e39519a8-359d-41f4-898a-70bbeb8bdb2d/imagenes_de_dragon_ball_z_dios.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_off0000dde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE2 4908 bytes
SHA-256: 1536ab70aefae2563e03edad7b02f7fa7209752f69e99436b33c562a338ac09b
font_01_sfnt_off0000ee91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE91 10952 bytes
SHA-256: 5ec84f8db0aab3e2acf1c76c942a15a43fca0af271929c8111a57b458b0decf8
font_02_sfnt_off000113bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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