Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0befe41c8176223…

MALICIOUS

PDF

77.9 KB Created: 2021-03-14 08:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b30e7007c2a29f23850fa3ef8e97971b SHA-1: 70cb6eadf837d9bc8c0bda52ecb71bd8ad6f41e0 SHA-256: e0befe41c8176223f226a3c6aef6a73ea8df64f5ce462e99b633e069e8f37eaa
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 0.9952

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://seumenha.ru/123?utm_term=microscope+lab+letter+e+answer+key PDF link annotation
    • http://iciko.xyz/grammar_book_class_5thbo1n8.pdfIn PDF document text
    • http://filanion.online/92889033201ud9e6.pdfIn PDF document text
    • https://doxorovovo.weebly.com/uploads/1/3/4/4/134479089/8047743.pdfIn PDF document text
    • http://fito4ka.xyz/79667738243e5bl9.pdfIn PDF document text
    • http://ribadubeko.scienceontheweb.net/jomijenowezufew.pdfIn PDF document text
    • https://sukigemanewa.weebly.com/uploads/1/3/2/6/132681928/4234394.pdfIn PDF document text
    • http://loleveze.iblogger.org/examen_ser_bachiller_2019_costa.pdfIn PDF document text
    • https://cdn.sqhk.co/nobukomorur/bjdX2b3/19630703063.pdfIn PDF document text
    • http://buylettersonline.com/lentiform_nucleus_stroke_icd_100k0ok.pdfIn PDF document text
    • http://motarojetox.sportsontheweb.net/torujumodujudawi.pdfIn PDF document text
    • https://pafetinavip.weebly.com/uploads/1/3/4/8/134868030/54b3e96094e3c.pdfIn PDF document text
    • http://nakrutkavk.site/what_was_the_plant_in_little_shop_of_horrorsqv1z5.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/gcvWgdq/90291017201.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/gzB5H1w/steam_download_speed_limit.pdfIn PDF document text
    • https://welirupew.weebly.com/uploads/1/3/4/6/134662060/652e16.pdfIn PDF document text
    • https://cdn.sqhk.co/sosexazefip/igh4mge/movies_anywhere_digital_codes_free.pdfIn PDF document text
    • https://gugagefa.weebly.com/uploads/1/3/4/3/134343265/6532643.pdfIn PDF document text
    • http://pasadurasasagi.medianewsonline.com/bebebitapun.pdfIn PDF document text
    • https://cdn.sqhk.co/fakomuse/iiVMzRS/amma_rajinama_songs_naa_songs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/wagevijobexugax.pdfIn PDF document text
    • http://fedepor.rf.gd/network_topology_types_with_diagram.pdfIn PDF document text
    • http://benosubageratiw.epizy.com/how_do_you_reset_a_ge_z_wave_light_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/syphilis_guideline__2558.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/34110041855.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/live_planet_tv_apk_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/asus_mx279h_mount.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E3 5332 bytes
SHA-256: 054a78879da05956a7765f23aef560e292ea782eb6290aa13a02293145a1ff21
font_01_sfnt_off0000f62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62D 6148 bytes
SHA-256: 4910d0177da9f60ecc92c13a34fae8c5c38ffafb9e4e22a3c3fd987548b79157
font_02_sfnt_off0001060e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060E 10360 bytes
SHA-256: da596baf33fb75f853425a1dba87d9870839a342358c1b1e8d6d33d9a5f789ce