Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa0e62712bd1d67…

MALICIOUS

PDF

80.1 KB Created: 2021-04-03 14:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 321f273c3f8ac1a96e075e9bbbc89553 SHA-1: e3fb61e6368a4ebb61211076048ec4179c20585f SHA-256: dfa0e62712bd1d67d3c3c7bbaa89d91b29a24dbade5c99b71f9f63e2254bca7a
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to obscure the ultimate destination of a malicious download. The document body, though heavily obfuscated, contains metadata related to 'hall ticket download', a common lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=tnusrb+hall+ticket+download+pdf PDF link annotation
    • http://lumogodasekepi.mypressonline.com/oracle_sql_developer_download_for_pc.pdfIn PDF document text
    • http://gaxopuxa.iblogger.org/best_time_to_catch_squid_in_moreton_bay.pdfIn PDF document text
    • https://likerediweraj.weebly.com/uploads/1/3/4/6/134691167/4535098.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/ggiKgjb/fekoxowakuwimasuva.pdfIn PDF document text
    • http://xiruzox.mygamesonline.org/sivowagolevewalokobumije.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/kigoja1/31972794742.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/gejumulowag.pdfIn PDF document text
    • https://tojuxumisadef.weebly.com/uploads/1/3/4/7/134714483/4e46df2789ea4.pdfIn PDF document text
    • https://zatitudebijozi.weebly.com/uploads/1/3/4/4/134460539/3863672.pdfIn PDF document text
    • https://dusuwepi.weebly.com/uploads/1/3/4/5/134589125/xamegoluxamerawi.pdfIn PDF document text
    • https://pepajodik.weebly.com/uploads/1/3/1/4/131453945/pokusexojex-wafemejuxesat-reridinaneto.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://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_7abadc73090a4c7fbe7691a61b21dbf6.pdf?index=trueIn PDF document text
    • http://gipebevu.atwebpages.com/4th_grade_fraction_word_problems.pdfIn PDF document text
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_023b32cada934614b9dda0f97ef8c6a0.pdf?index=trueIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_32dffde84eb84d70a520509a6b02ddcc.pdf?index=trueIn PDF document text
    • http://gikumud.epizy.com/alergia_a_los_aines_alternativas.pdfIn PDF document text
    • https://e7ba4f66-d023-404d-a355-a5b98970f127.filesusr.com/ugd/cac9e4_bb3548b8726548ad867b47f89de4aaf5.pdf?index=trueIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_657b11b21efa4760a479dbcd6ed2e32c.pdf?index=trueIn PDF document text
    • http://lodafudamisov.epizy.com/91362507625.pdfIn PDF document text
    • http://vizulubafaxal.epizy.com/idiopathic_thrombocytopenia_guidelines.pdfIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_e6b8f5ce99b54d3eb314f12c889759a1.pdf?index=trueIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_d685c7038d17492086b21ff4d7e37bc0.pdf?index=trueIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_31caa0bbab264ddca4308c8698933e9d.pdf?index=trueIn 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_off0000eb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB52 5368 bytes
SHA-256: 97dc40b5a4db6a8f56c883ab98ce66a650388ebb31dc5730bf9276e744290528
font_01_sfnt_off0000fd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8D 10944 bytes
SHA-256: ef956fa8851c262426808d15ad3e7bfcf1309df1471a335df82458d02675280a
font_02_sfnt_off000122d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D6 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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