Malicious PDF — malware analysis report

Static analysis result for SHA-256 486727b52e895052…

MALICIOUS

PDF

81.1 KB Created: 2021-03-19 04:04:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 040f8798ef2e0c62709426550f2d1edf SHA-1: 339393d435c6b54e1bd9bfdf2fe37a9065175e3b SHA-256: 486727b52e895052bce3e19781c183e497acb5d27bd5c9c51ecac0b58b4a5654
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of 'utm_term' in one of the URLs indicates a tracking mechanism, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://golowaki.ru/123?utm_term=internet+video+er+online
    • http://nemugub.mywebcommunity.org/sda_hymnal_sheet_music.pdf
    • http://nakodinita.scienceontheweb.net/92216060029.pdf
    • http://fulokixowo.scienceontheweb.net/kerodebutumekikibugiw.pdf
    • https://sixonawujow.weebly.com/uploads/1/3/4/3/134369174/bafobetiwidapol_lewonerimili_kagan.pdf
    • http://maykistore.ru/warrior_cats_books_1gilks.pdf
    • http://zelumefepa.sportsontheweb.net/rugulawulepunalo.pdf
    • http://lejifip.sportsontheweb.net/ruferesoritefawi.pdf
    • https://wilalupesakugos.weebly.com/uploads/1/3/4/2/134235894/e7c4a82df0a.pdf
    • http://iclod.tech/midorokod0pa2.pdf
    • http://kufafukedexepix.mygamesonline.org/16598896037.pdf
    • https://juvedolukojubis.weebly.com/uploads/1/3/2/6/132682904/fojabisose-suzubemovabalo-xuzabok-dadel.pdf
    • http://changely.club/mcgraw_hill_kindergarten_math8yu7p.pdf
    • http://kirivil.iblogger.org/pronom_relatif_qui_que_dont_ou_exercices.pdf
    • http://card2card.live/contemporary_sport_management_4th_edition_freeyuqnq.pdf
    • http://f13x.xyz/timurokawmig6f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xadogugatu.epizy.com/lord_i_need_you_song_bpm.pdf
    • http://siloxatomikuje.rf.gd/wedding_march_piano_sheet_easy.pdf
    • https://uploads.strikinglycdn.com/files/ddd15808-8dbf-45d4-beec-0a456c851a0c/samsung_smart_tv_55_inch_curved.pdf
    • http://xurosuforudev.atwebpages.com/hyperbole_and_a_half_book.pdf
    • http://xawiwevivuzox.onlinewebshop.net/naruto_shippuden_manga.pdf
    • https://uploads.strikinglycdn.com/files/6109926a-28af-4956-9e7d-f13ea4abef24/razesagumijurapabobogoje.pdf
    • http://gefifeji.rf.gd/19705360707.pdf
    • https://uploads.strikinglycdn.com/files/d7b4a8ba-2c09-4a6d-bd58-27bbd217eafe/how_long_do_you_cook_chili_in_a_crockpot.pdf
    • https://uploads.strikinglycdn.com/files/ce4e9981-73fc-4949-b603-d04cb1ab0c29/how_long_is_walmart_maternity_leave.pdf
    • https://uploads.strikinglycdn.com/files/0f295099-4ce5-4655-9e88-6feb8fc2f8f1/nordictrack_elliptical_audiostrider_990_specs.pdf
    • http://vopepogam.rf.gd/boulevard_nights_full_movie.pdf
    • http://xawiwevivuzox.onlinewebshop.net/how_he_loves_david_crowder_piano.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f280.bin
af1762eb0b7f84ffb630f521a560efd1ce0d603b5d3cc50d61217c8694f501c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF280 3568 bytes
font_01_sfnt_off0000ff47.bin
b13461f0831706ad033b0189211ba3b124690fb2c6195e485eedf43cbfd5066e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF47 4428 bytes
font_02_sfnt_off00010e66.bin
a78f1588642936dae1a25786853e2a18ea80398f31591b0a667f82fc164be047		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E66 12436 bytes

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