Malicious PDF — malware analysis report

Static analysis result for SHA-256 651982ca4947be65…

MALICIOUS

PDF

153.0 KB Created: 2021-03-07 10:51:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 67594a44c4b66ad233f94555cf3a8ed6 SHA-1: cf936a076233cc44c39ff0bfb5486a66e187c48b SHA-256: 651982ca4947be654e088a070b21d064e3f9be262f7f13a315f7391f6f438ecc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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/123?utm_term=a+count+of+monte+cristo+summary PDF link annotation
    • https://cdn.sqhk.co/rurizibaxami/2hbcSOv/shooty_skies_mod_apk_download.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/e96e709a1524e.pdfIn PDF document text
    • https://jibanexoruna.weebly.com/uploads/1/3/5/3/135338247/4385815.pdfIn PDF document text
    • https://tepewumulu.weebly.com/uploads/1/3/1/3/131384412/rukikudaravov.pdfIn PDF document text
    • https://poxefapujo.weebly.com/uploads/1/3/5/3/135312596/bofakolusavev.pdfIn PDF document text
    • https://cdn.sqhk.co/fuludasowipu/ghjifgj/runusufagozaji.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/jwGxjgm/75389411943.pdfIn PDF document text
    • http://8bitbeardsco.com/caddx_nx_8_installation_manual5c8mo.pdfIn PDF document text
    • https://jixepelisu.weebly.com/uploads/1/3/2/6/132695865/91df0e6d1a45.pdfIn PDF document text
    • https://boretenewur.weebly.com/uploads/1/3/1/4/131453221/8a5f9f4ca2e8354.pdfIn PDF document text
    • https://puritokubopop.weebly.com/uploads/1/3/5/9/135968540/poparodidesawesu.pdfIn PDF document text
    • http://jofijuke.22web.org/taxeralanogaviwisini.pdfIn PDF document text
    • https://vilinumatilaji.weebly.com/uploads/1/3/2/7/132740241/b2db7ad.pdfIn PDF document text
    • http://basvuruizleme.online/gasar7cmo6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/f97a9518-263c-4d83-af33-77d5fb5656b0/what_soda_does_not_have_brominated_vegetable_oil.pdfIn PDF document text
    • http://jinonepi.epizy.com/11568412453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae7999cb-89a7-42a4-87b7-07598054d7b6/radio_pioneer_deh_1300mp.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E6C 29556 bytes
SHA-256: 719d5b4de503368b5d209af78ddb19c945dab6445853e65c95b09afb08827531
font_01_sfnt_off0001f996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F996 5084 bytes
SHA-256: 62c67ca9c3015696babf98841b62280f411c375aab51e67352993941173d2b17
font_02_sfnt_off00020ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20AD3 3960 bytes
SHA-256: a7f7288efc891a3dd16de36f87f77472fe79f10e129a954aac668f872448a153
font_03_sfnt_off0002192d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2192D 12384 bytes
SHA-256: 83d2622313ae90fbefd5fa6ebe075cba680435be0b0db99e7f6747e727bef6ed
font_04_sfnt_off000240c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x240C1 16028 bytes
SHA-256: 3e66ce8c90719045bf8f6c8d5f716325bbce29c89c8399c9e71e7e90b46a9b16

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