Malicious PDF — malware analysis report

Static analysis result for SHA-256 53b0fbb44807dec4…

MALICIOUS

PDF

75.9 KB Created: 2021-03-14 00:28:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d26c4385343f2ef9ed0ccb17f7b2af29 SHA-1: b12a9ee8717b26c55aacb11293731d5416814e3b SHA-256: 53b0fbb44807dec4c93c3119ad123347c73aafd4da96830f73ce469b5636d10f
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, indicative of a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the document's metadata suggesting it's a 'Beneficiary designation form colorado' further support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://jumiwimov.ru/123?utm_term=beneficiary+designation+form+colorado PDF link annotation
    • http://tehnikator.ru/causative_verbs_exercises_with_answers_doc04hec.pdfIn PDF document text
    • https://cdn.sqhk.co/jotoselu/hdiagdi/weather_forecast_for_this_weekend_san_antonio.pdfIn PDF document text
    • http://gokutep.22web.org/epf_withdrawal_form_10c_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/PUhbSWj/empire_tv_tycoon_download.pdfIn PDF document text
    • http://freedate18.xyz/how_to_stabilize_a_bookshelf_without_backingm8lm3.pdfIn PDF document text
    • https://cdn.sqhk.co/setawigiz/fjdiihi/times_square_ball_drop_2020_replay.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/shbZgfv/rubuxu.pdfIn PDF document text
    • http://lovoravemufedoz.22web.org/bram_stokers_dracula_quotes_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/nilofixogezu/je6o7ia/bajofebelewoli.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/Lhchiax/siwojodibulikuwalesirejak.pdfIn PDF document text
    • https://cdn.sqhk.co/lupokuna/kBhanVt/wurururovanofelo.pdfIn PDF document text
    • http://gufutaca6.xyz/giwukidewexadeojlbq.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinirumawe/hcidgcL/prime_peaks_best_car_for_winter_games.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/hbpjfBl/amazon_prime_rolling_stones_shirts.pdfIn PDF document text
    • https://cdn.sqhk.co/taviboku/degfqp8/mx3_pro_air_mouse_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mupufuten.epizy.com/94373774659.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/83152698653.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_cae81922ab5c40ca9172c9ea5e3aa683.pdf?index=trueIn PDF document text
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_9e16d6f0faac42b5912c9e7af0177120.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/learning_curve_dashed_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/81160463661.pdfIn PDF document text
    • https://b8e64ff8-a522-4625-8e91-70fe47930cb2.filesusr.com/ugd/37987b_11e8c10db55d43a0a03e12667e2c6217.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEE 5492 bytes
SHA-256: b41ebe42498a0cd10221338363721f024b62aeca4fed40692a1899cc1a007fc6
font_01_sfnt_off0000fe99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE99 10368 bytes
SHA-256: a6ad586725d892153e9560183172ca38024e155f7dc89f7f7bcf87961b6e9767