Malicious PDF — malware analysis report

Static analysis result for SHA-256 6577ba04b0fb9ec7…

MALICIOUS

PDF

81.5 KB Created: 2021-03-24 03:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7386a833c1957a56123eafa0c97a7115 SHA-1: 83cacf99b65a8b21015f2ae3b0b860aeb396ce2b SHA-256: 6577ba04b0fb9ec706e668b7bea57f4e6c6a72298d7dd08ad5eee0022edd2aab
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/aws?utm_term=alcoholic+anonymous+meetings+in+my+area PDF link annotation
    • https://goxanakevixi.weebly.com/uploads/1/3/4/8/134857001/kenoxarunereroraku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_601791944b708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410222/normal_605a50cc8cad2.pdfIn PDF document text
    • http://xinuvaro.sportsontheweb.net/rapul.pdfIn PDF document text
    • https://jaduxokapatusiw.weebly.com/uploads/1/3/5/3/135301375/dimezorimupa.pdfIn PDF document text
    • https://xelavizagak.weebly.com/uploads/1/3/5/3/135325118/7727a9.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/xugesevilabowifalokulodi.pdfIn PDF document text
    • https://zomanuvid.weebly.com/uploads/1/3/4/4/134477829/b8499ef8079e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_60261ef665a53.pdfIn PDF document text
    • https://kalokawagubur.weebly.com/uploads/1/3/1/3/131398574/8628123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_600ce2bdf2ff1.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/oxford_dictionary_english_to_odia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417827/normal_601ffe72aaf13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/05c9d068-f24e-4f9a-9094-835b30006688/what_country_is_soundpeats_from.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791da811-6fbd-4e25-b2c1-65b32b1443a4/toro_724_snowblower_oil_type.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af80df8b-1e53-4952-bca7-97a5e0e08103/what_is_the_message_of_girl_interrupted.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/xuwozinatolufoxenul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e17a82e2-a672-4988-bd4b-3cdcf106252a/matlab_plot_box_line_width.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/23307209705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18702c09-ee2d-4e79-9af6-60614baeb191/gikabaguda.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/dosage_de_l_acide_urique_dans_les_urines.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/ridgid_planer_blades_tp13000.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_off0000ffe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE9 5304 bytes
SHA-256: 743c5251ef8f108cc65a02d94bf910c1583b41ccbff9069771a4a7f6a06880c9
font_01_sfnt_off000111d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D2 11932 bytes
SHA-256: d52f3f67b9f3efb19bd176297d7e38e710742782c760ddd3cb02c4bb289b28b8

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