Malicious PDF — malware analysis report

Static analysis result for SHA-256 aabaa8c7c2730f52…

MALICIOUS

PDF

94.0 KB Created: 2021-02-24 00:55:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4c3e8c19483f1fe7b752f60f9ac61d0f SHA-1: 9d00963e06b985396c5f7fa35afb8588894186e3 SHA-256: aabaa8c7c2730f52897a6c145c3f98938a572c10968f524a35d25eccc543613f
126 Risk Score

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://maypoin.ru/strik?utm_term=devi+kavacham+lyrics+in+sanskrit PDF link annotation
    • http://ecoterritory.store/99197162172xpn4i.pdfIn PDF document text
    • http://anarchymedya.com/warifajisutuszemj.pdfIn PDF document text
    • http://hookup755.fun/960750221613mesl.pdfIn PDF document text
    • http://formblckr1.xyz/bosch_double_oven_manualb9yap.pdfIn PDF document text
    • http://begemotiks.space/tobujoletuliwatabilijuk3b57.pdfIn PDF document text
    • http://nuxagoliwanep.22web.org/lesoborodakedasuboneper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465147/normal_6025b682254fa.pdfIn PDF document text
    • http://magicwoolshop.com/8_ball_pool_free_apkot462.pdfIn PDF document text
    • http://xeeewq.xyz/sepoxa1rljo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392439/normal_5ff1170e1df01.pdfIn PDF document text
    • http://emirofficialzm.com/26287807359mkfvp.pdfIn PDF document text
    • http://pitushok.fun/worksheet_interpreting_graphs_linear_motion_answer_keyb3qo6.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
    • http://ginokaze.epizy.com/yandex_music_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/16533045720.pdfIn PDF document text
    • http://rejosunugewojif.epizy.com/marcus_derrickson_scouting_report.pdfIn PDF document text
    • http://soburuwukipo.epizy.com/elbow_hygroma_in_dogs.pdfIn PDF document text
    • http://vofiwevo.epizy.com/body_parts_worksheet_for_kindergarten.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000137a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x137A2 27884 bytes
SHA-256: 287bbb6b8926914ffb0492808eca00d685947bd70149d5aab51f7ee77cbaf02b
font_00_sfnt_off0000f338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF338 5264 bytes
SHA-256: 7f038791a93c414a95a3b39a33dc5c5f8c92e9be5e8233aaf89c579761bc18ff
font_01_sfnt_off00010507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10507 2140 bytes
SHA-256: fd0baac36cf8fc893687cbe6b3b8165417b6c4fca046c9a5e64821bfdf5295b8
font_02_sfnt_off00010e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7B 13948 bytes
SHA-256: f9844b5521042e09410334eab94beadb216e9c7ba1928222471c3bace74705ad