Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ce45cee62f956f…

MALICIOUS

PDF

91.4 KB Created: 2021-03-22 20:01:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 17cf79b909f99f7167fb39ba93b9d767 SHA-1: a16d9eb23648cae18ab6b612fa694353f93dab8e SHA-256: 03ce45cee62f956fde84ef85608c24feba83145e1e04441845d3ff8c1d4e9368
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The embedded URLs and the heuristic findings strongly suggest an attempt to direct users to external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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 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://jottigo.ru/wix?keyword=f2p+ironman+skiller+guide PDF link annotation
    • https://cdn.sqhk.co/tezofugowura/AShdjnt/36664276054.pdfIn PDF document text
    • http://hook-up.fun/65249176473grls.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/ahdicsu/2_player_box_fight.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/ejrijjI/cosmopolitan_pool_drink_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/pjdhcJb/bandicam_recorder_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/tobamozusaj/ehhgYib/volleyball_challenge_volleyball_game_mod_apk.pdfIn PDF document text
    • http://evilcheats.fun/42502257127fot1o.pdfIn PDF document text
    • https://cdn.sqhk.co/vozedolurezu/gf5iisA/79320244986.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/dWJghjf/39039007461.pdfIn PDF document text
    • http://pushbiz.fun/93137846429ugkor.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/hghhggj/english_to_urdu_translation_voice_translation.pdfIn PDF document text
    • https://cdn.sqhk.co/kujusiru/UijyNjh/air_force_fighter_jets_1950_s.pdfIn PDF document text
    • https://cdn.sqhk.co/jatobeguji/gvUjcjb/89801712880.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_fa6470b6c077483aad10abc45d5efc75.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f590485-83fd-459a-9c07-08eefec7bb40/what_is_tcp_ip_in_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20662d75-b752-4385-9152-8a161ed444a9/kuwurexuxofuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79f5bc1-cb81-4d60-8d9b-240d3c8b189e/xowoluvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c46b5f4-3101-4d32-b5c9-032224c03779/how_might_you_persuade_someone_to_establish_a_settled_community.pdfIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_fa814bf235224bd7b907d581fc5aa824.pdf?index=trueIn PDF document text
    • https://fec450ea-b80f-4746-b851-35139cc02de5.filesusr.com/ugd/53a83b_b640773475504ba4854074745eaa4245.pdf?index=trueIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_d765249b0fc84b5aabcb388f3ed6a595.pdf?index=trueIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_1a4bff6fd3034264b97dbc70b7afa4bc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9f54338-5712-4290-84be-fd01acc73220/how_to_clean_keurig_2.0_water_filter.pdfIn PDF document text
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_d60d0024987b449d848a6682bd4379a2.pdf?index=trueIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_0e8df61aeabd44a489106beda598d1c6.pdf?index=trueIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_1c36ebe792be4ecd81fb40b0f438cf1d.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_off00012706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12706 5432 bytes
SHA-256: c0fc4d3586ac34ea73cbea043772761afde4cabf11200d0944176fafd2252beb
font_01_sfnt_off0001396e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1396E 11428 bytes
SHA-256: 47ce917b90918559d639e431fec47f34a858fbf7a6c553fe58c6a2b41d751602