Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bc39bb78c0f2287…

MALICIOUS

PDF

77.3 KB Created: 2021-03-21 06:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5b74d1919331ae2ffe955e3c84e0d85e SHA-1: 684826c0552b009f7473b1b835d8a2f67fcaffcb SHA-256: 8bc39bb78c0f2287d00f48a83d84da07f5834503013b1e25105417d07a058eb3
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to a URL that appears to be a lure for downloading software. Additionally, a heuristic indicates a PDF link farm, suggesting an attempt to distribute content or traffic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://dafemum.ru/wix?keyword=wavepad+pro+apk+download In PDF document text
    • http://subuxiwubemew.getenjoyment.net/foxit_reader_for_android.pdfIn PDF document text
    • http://amandeepsadyora.com/ultrasonografia_ginecologica_bajo_arenasygfch.pdfIn PDF document text
    • https://pixerogamaba.weebly.com/uploads/1/3/1/8/131871590/bunivexazon_vivanu_rufoviku_xigamije.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/causes_of_stomach_ulcer.pdfIn PDF document text
    • http://natorg.fun/yasin_rumi_downloadxnosj.pdfIn PDF document text
    • https://pufodafu.weebly.com/uploads/1/3/5/9/135959320/jatowowi_tazusasupa.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/apriori_algorithm_in_data_mining_with_example.pdfIn PDF document text
    • http://kawasus.scienceontheweb.net/writing_arabic_letters.pdfIn PDF document text
    • http://reduslim-shopofficial.site/vataluzl2pk7.pdfIn PDF document text
    • http://hookup153.online/daponabenarokudogizabpbewc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/doxifuba/vakixizigugemoxudof.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/25727024335.pdfIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/gojumejubom.pdfIn PDF document text
    • http://tosabukevosubar.myartsonline.com/madeline_singas_bio.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/rulatudaginisi.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/como_desbloquear_el_administrador_de_dispositivos_android.pdfIn PDF document text
    • http://refusunono.onlinewebshop.net/nubugo.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/amphibolite_gneisses_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/gogolizugijekukowajalaba.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_off0000e6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DC 5004 bytes
SHA-256: 0db39827a1569a700feb926fbb3a9884290aa358b107d9455a23ecc75950fdab
font_01_sfnt_off0000f80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80C 14816 bytes
SHA-256: 51bbea4a31a362e47bf50b57e7255c81cade04c3be76fd0557b07598ab14313c

Open this report in the interactive analyzer, or submit your own file for analysis.