Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d5f212a2c2d75ad…

MALICIOUS

PDF

72.3 KB Created: 2021-02-26 22:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: d3b3a1c16de623589a97ca9de9a14bcd SHA-1: 9c713d033214a0758d5c170f7b9a6f476304382d SHA-256: 4d5f212a2c2d75ad366805f0fb40aa86758aaa831a63de9588f5e43ecfe624dc
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan. It contains numerous external URIs pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to trick users into downloading further malware or visiting phishing sites.

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://jottigo.ru/123?utm_term=how+to+pair+sylvania+soundbar PDF link annotation
    • https://cdn.sqhk.co/miburixegapu/dAhj7E2/cnc_programming_basics_tutorial_textbook.pdfIn PDF document text
    • http://tricitysikhs.com/24581507216djvci.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/gdiijcv/334142131.pdfIn PDF document text
    • https://sufexijim.weebly.com/uploads/1/3/4/6/134679247/fubimasari_dojadubiguxef.pdfIn PDF document text
    • http://lianhua.life/a_court_of_wings_and_ruin_common_sense_mediav69ve.pdfIn PDF document text
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/kipajutuvorojizefo.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/lg_refrigerator_lfx28968st_freezer_not_working.pdfIn PDF document text
    • http://frukt.space/digimon_next_order_field_guide1v1yx.pdfIn PDF document text
    • https://tejukikefuxod.weebly.com/uploads/1/3/4/7/134703803/6144935.pdfIn PDF document text
    • http://fuckfrsky.com/40906531518pl5fu.pdfIn PDF document text
    • http://desokore.medianewsonline.com/48847539312.pdfIn PDF document text
    • https://lorotorerusut.weebly.com/uploads/1/3/1/4/131452969/radakofaja.pdfIn PDF document text
    • http://talkme-news.info/maze_runner_la_rivelazione_film_streaming_itasegzf.pdfIn PDF document text
    • https://cdn.sqhk.co/nidaruzada/ca9ihUv/tech_news_apps_lock.pdfIn PDF document text
    • https://mifevulesitiz.weebly.com/uploads/1/3/5/3/135321383/sikoteguzisi.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/hjhe7Ng/the_battle_cats_wiki_no_plan_a.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/child_development_worksheetsb0xdk.pdfIn PDF document text
    • http://apparently-home.com/homelite_leaf_blower_vacuum_manualazprq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zotubune.myartsonline.com/accuair_e-level_touchpad_controller_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/longitude_and_latitude_worksheets_canada.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/behringer_inuke_nu6000_manual.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD097 5072 bytes
SHA-256: dc7566cc8eb32a0379960f8d5d27010071013099e3e253ba4f08efcea7ad6042
font_01_sfnt_off0000e1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E1 10504 bytes
SHA-256: 24a31df9b35ed94b2a4751e12eda358c6a8f9ed901dc01964eb0db766d6f4f91
font_02_sfnt_off000105c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C9 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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