Malicious PDF — malware analysis report

Static analysis result for SHA-256 0796d1723c160379…

MALICIOUS

PDF

72.2 KB Created: 2020-12-17 05:57:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: aa3b840e8e62782de2efa4812d25c247 SHA-1: be1c650bd571266e98109dfa5c3ee2248ea81b1a SHA-256: 0796d1723c160379d244ff404cc4954b8b2ace155ba6740438f8e7ce3fad64e3
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, indicating an attempt to lead the user to malicious content. The document body, though obfuscated, contains text related to search queries, suggesting a phishing or SEO poisoning lure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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/123?utm_term=the+crucible+act+2+answers+pdf In PDF document text
    • https://riwetomawojok.weebly.com/uploads/1/3/4/5/134516188/boworugudib.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/zuses/4409720731.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/lanapufasaxosivu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5729540f1034a5cc777a2/t/5fd72803ab77727176a89f80/1607936004009/semuri.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/corporate_citizenship_report_2017.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c362403f5353fd950a5e/t/5fc1260d3485235c86efc3c5/1606493709784/republic_plato_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/chemistry_and_chemical_reactivity_9th_edition_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/85586483969.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5888ba13a450bab13d611/t/5fce7fdf387ef534ac083154/1607368673531/easy_approval_payday_loans_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79382ed1-e5a1-4448-bb28-fd1ae479ce35/no_fear_shakespeare_twelfth_night.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/aircard_790s_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d2a4df132613bbd6bae0/t/5fd1fc8bef89ac66837b1553/1607597195686/minion_wireless_speaker.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/48866348937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53bdeec9-6718-45d3-80da-cdf3cade3171/tipos_de_climas_en_mexico.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d05c403f5353fdaeb827/t/5fc8b42fb0f45b2a3d2bc877/1606988847905/24194608322.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66c646b97992eb5814648/t/5fd1d20f23f2866aa38a31aa/1607586319962/drive_by_birthday.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_off0000da7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7E 5556 bytes
SHA-256: 75ffeef1cc2c8b8594067cd9436b5d850b686473ea034e3c566e08fa2f0ab1e8
font_01_sfnt_off0000ed6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 11628 bytes
SHA-256: db734ed7d54ac66aff975af62a65dc0ebcb44de496072e4dbea8087e89947d16

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