Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0334025e3e29b1…

MALICIOUS

PDF

73.2 KB Created: 2020-12-17 04:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 63a162d8d997dee15c73308b7e09b6e6 SHA-1: 9e1f34346d4b76b7948a81e5a26223587364071c SHA-256: 9b0334025e3e29b173e00128f73bc550c619483bed1ff40f2a9378c50a6cb1bf
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is identified as malicious by ClamAV and a machine learning classifier, and it contains critical heuristic firings indicating it links to known malicious redirector infrastructure and is part of a PDF link farm. The embedded URLs, such as 'https://gettraff.ru/strik?utm_term=project+management+pdf+notes+for+bba', are likely used to redirect users to phishing or malware-hosting sites. Although no scripts were explicitly extracted, the PDF structure and malicious links strongly suggest an intent to compromise users through social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/strik?utm_term=project+management+pdf+notes+for+bba In PDF document text
    • https://xojoguxivizu.weebly.com/uploads/1/3/4/0/134096407/zezuxaxina.pdfIn PDF document text
    • https://nibafowezibinax.weebly.com/uploads/1/3/4/3/134319588/tisejorezaba.pdfIn PDF document text
    • https://rulamajovag.weebly.com/uploads/1/3/4/7/134764486/b3de3ffa2.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/begigud.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/4d47afca2b6b07.pdfIn PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/nulawonifepakinoj.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/zumezeviwakiz/bootstrap_template_for_register_form.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59a85bf71053ccb2fa840/t/5fc7e8d994e111303992d260/1606936793372/22956024429.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b38a17e72026400ae24f/t/5fd1591fef89ac6683670f73/1607555360417/sibotabugeliwugosot.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/conjugaison_avoir_en_anglais_forme_ngative.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/shore_conference_bowling.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/change_theme_google_chrome_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/20405474733.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/10978237218.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/30604308098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98a15b8a-6559-4bdd-8bd0-d0d314fab0d8/the_taking_of_tiger_mountain_torrent.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_off0000e1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F0 5660 bytes
SHA-256: 7543840bfced6e2d30b6f4529519b3b1f06c1bd6a5972158ad28af2e3fa648c4
font_01_sfnt_off0000f519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF519 10288 bytes
SHA-256: 37e2ab999b98787d0c4e94f38191ab302756ed4a93362807ed186843bf59b065

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