Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9e5bf316857141…

MALICIOUS

PDF

72.0 KB Created: 2021-05-07 00:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 18c0b21d6a494fd7c909bd5b449b51ee SHA-1: 27dd6e2ae3e9619a5de0c7c9e654b59d7d091c98 SHA-256: be9e5bf316857141519f70d1efb3174a862feca3239261192bc52baf6c00a073
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable or redirector domains, indicating a link farm designed to distribute malicious content or phish users. The heuristic firings confirm the presence of malicious redirector links and a link farm on disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

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
  • 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 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.
  • 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://yafferge.ru/strik?utm_term=where+is+the+learn+button+on+liftmaster+gate+opener In PDF document text
    • https://cdn.sqhk.co/nepajenine/ichgii6/30275775433.pdfIn PDF document text
    • https://mokizafot.weebly.com/uploads/1/3/5/3/135347773/zomivivafogajoku.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/NvjijjK/nuclear_alarm_siren_download.pdfIn PDF document text
    • https://fumevido.weebly.com/uploads/1/3/0/8/130874276/5437548.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/bd8CVja/jebirezivana.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/bvIQhou/fiji_airways_fleet_age.pdfIn PDF document text
    • https://vizufawamowimo.weebly.com/uploads/1/3/4/7/134700475/bawageje-sezar-sirogikurukobi-lotedujolo.pdfIn PDF document text
    • http://rolazipomi.22web.org/regiluxelarodazo.pdfIn PDF document text
    • https://kafijojiwagovi.weebly.com/uploads/1/3/5/3/135387916/d28de.pdfIn PDF document text
    • https://cdn.sqhk.co/tupuvojili/mLcUtST/kiravasef.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/11059281104.pdfIn PDF document text
    • http://xokijaxano.medianewsonline.com/muturotet.pdfIn PDF document text
    • https://roxopukerij.weebly.com/uploads/1/3/4/3/134396723/xebupofowubid.pdfIn PDF document text
    • http://lumasewupuzu.iblogger.org/led_zeppelin_houses_of_the_holy_songbook.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/FyEgjhb/hearthstone_tombs_of_terror_guide_chapter_3.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/jiBiehM/zuwobujifabone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://toxabose.epizy.com/destination_b2_grammar_and_vocabulary_free.pdfIn PDF document text
    • http://vegiziguso.rf.gd/lord_of_the_flies_movie_cast_1963.pdfIn PDF document text
    • http://sonogobujajeva.rf.gd/27069503590.pdfIn PDF document text
    • http://bamemuwibe.epizy.com/yellow_background_colour.pdfIn PDF document text
    • http://valolezame.epizy.com/bncc_atualizada_resumida.pdfIn PDF document text
    • http://sunosazogefot.epizy.com/16893360342.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA09 5468 bytes
SHA-256: 82d9b9ea782ecfa466359bf59d520135a39e2172100b9c1d4d1cb84fc627c454
font_01_sfnt_off0000ec86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC86 11212 bytes
SHA-256: a75924e739cd363c942dae1e8695da9dfb28b5a8e66e84e06de6bbefbdd7acb0