Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6128b745f3c0c4…

MALICIOUS

PDF

117.3 KB Created: 2021-03-30 15:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d58b36cbaa26a67e4c26b85929498cef SHA-1: c21b88b4e5db216214afaa5c4616c66437f8b125 SHA-256: eb6128b745f3c0c418cbdfc5ca0526869a6da0330a46836e437c24b37fcb084b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, appears to be a lure related to admission circulars, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://bologen.ru/award?keyword=ru+admission+circular+2020+20+pdf PDF link annotation
    • http://vandify.com/net_and_gross_weight_worksheetahrjp.pdfIn PDF document text
    • https://cdn.sqhk.co/pipidopowewe/heRjgic/21266387648.pdfIn PDF document text
    • http://bilet-pdd.site/wurosevesofxiigm.pdfIn PDF document text
    • http://shtangye.xyz/97534296217pog8c.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/jcijhfq/kowinusujet.pdfIn PDF document text
    • http://shopeuro.pro/9541388354882kvx.pdfIn PDF document text
    • http://1green.space/xadexixivudepakafipaajwx0.pdfIn PDF document text
    • https://lipijunozawisek.weebly.com/uploads/1/3/4/7/134721324/jesiwil.pdfIn PDF document text
    • http://chambreop.xyz/how_long_is_p90x3_yogatf1je.pdfIn PDF document text
    • https://fewobiwagarubi.weebly.com/uploads/1/3/4/6/134628358/8852930.pdfIn PDF document text
    • https://vojumemij.weebly.com/uploads/1/3/4/4/134473557/4819305.pdfIn PDF document text
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/woguvofason.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/C5hijhj/pick_me_up_game_download_for_pc.pdfIn PDF document text
    • https://bojuwidus.weebly.com/uploads/1/3/4/6/134698781/tobazalono.pdfIn PDF document text
    • http://allerlo.xyz/vapejhm8gy.pdfIn PDF document text
    • https://fuwefepitebu.weebly.com/uploads/1/3/4/7/134709748/zimipodoze-dajaze-wiwakanuf-mulivuw.pdfIn PDF document text
    • https://detalejutapebis.weebly.com/uploads/1/3/4/6/134610814/kademawaj.pdfIn PDF document text
    • https://cdn.sqhk.co/gatutojuse/mFG72nC/dragon_ball_z_goku_vs_android_17.pdfIn PDF document text
    • https://japosazononugad.weebly.com/uploads/1/3/4/5/134583509/tudateton.pdfIn PDF document text
    • http://1xbets-reg.site/kasavobagycsd.pdfIn PDF document text
    • https://tikefukexizuse.weebly.com/uploads/1/3/4/8/134879623/tawojuwigu.pdfIn PDF document text
    • http://futup.ru/what_does_the_woods_symbolize_in_a_midsummer_nights_dreamlivgt.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/815db1c2-a896-4060-bfed-95930643d867/how_common_is_child_trafficking_in_the_us.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a676f00a-6e6f-4878-99d2-99a967086052/the_beautiful_and_damned_page_count.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.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E7C 5580 bytes
SHA-256: daf98da767312ad1ff618210dcbd9079eafa97112327810d3d853d08aabedcd4
font_01_sfnt_off0001715e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1715E 15028 bytes
SHA-256: 8fa6e22cd80a6ae0a048d907d8893377200a21c8de197628b0de1d49ea562d1d
font_02_sfnt_off00019f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F6E 11428 bytes
SHA-256: cb657cb448c0e60f443940810f4e97e1a1e9541cad86e3c922b6eb4180816ff0