Malicious PDF — malware analysis report

Static analysis result for SHA-256 5197edf62840879d…

MALICIOUS

PDF

85.7 KB Created: 2021-02-26 09:10:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0b106465a250430fc12cc005fe6b2549 SHA-1: 189ce614138a964d9d7a7aa769fcea1fdb04810d SHA-256: 5197edf62840879d5614d97b126d5fc39dde78ac47c8f647573196d792ac7fc9
184 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains and redirector infrastructure, strongly indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were directly extracted, the embedded URLs and link farm structure suggest the document is designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=ap+world+history+unit+1+study+guide+answers In PDF document text
    • http://gisoboxizaza.mygamesonline.org/how_to_connect_hp_deskjet_3050_j610_series_wireless.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403264/normal_5fd83a9647ea1.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/ibyMCQ7/8_ball_pool_hack_pc.pdfIn PDF document text
    • http://fukerijinexin.mygamesonline.org/electrical_engineering_degree_ranking.pdfIn PDF document text
    • http://jagodadexujuza.iblogger.org/aew_dynamite_review_bleacher_report.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/41915176536.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378836/normal_5ff1ce5f3c52e.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/14997756913.pdfIn PDF document text
    • https://jufufowepum.weebly.com/uploads/1/3/5/3/135348100/tedip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bibirosomuxir.epizy.com/usps_intranet_tracking_report.pdfIn PDF document text
    • http://welididoseburiv.epizy.com/jodalosu.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/the_making_of_a_poem_a_norton_anthology_of_poetic_forms_ebook.pdfIn PDF document text
    • http://livirava.atwebpages.com/what_does_hydrogenated_vegetable_oil_mean.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91F 6872 bytes
SHA-256: 67e79166eab99d58c51b5605e0c69db1c2aa8670a9cd790b21b3c493144e1e5e
font_01_sfnt_off0000ea77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA77 5456 bytes
SHA-256: c8e52466dc0124f0064b28cacc28ef25c89f8bcefd8623dd65cd52fcba79aedb
font_02_sfnt_off0000fd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD10 10296 bytes
SHA-256: 198b31c7c448dfbe46e7f5c3fbb270f7374411b3f7e4754fe59396196d66aed5
font_03_sfnt_off00011d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9B 10448 bytes
SHA-256: 274d17803548a1e07b6cebf8dbaec269df21072244aac759afb638855595041d
font_04_sfnt_off0001415c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1415C 1736 bytes
SHA-256: 551918360585b1590efa6fd2a215345b2f702067d151a0e4b48cfa7490b57960

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