Malicious PDF — malware analysis report

Static analysis result for SHA-256 085850f25d070884…

MALICIOUS

PDF

73.6 KB Created: 2021-02-15 11:20:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 77deb4ce3e29e180a96e7a179b1041f1 SHA-1: b7e34a44ae733f143f59f283c7c09bb1e0a41a8d SHA-256: 085850f25d07088448b165be81bae2cdce2b533e3f5dbe5bb57708744a8c8bda
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites, including a known malicious redirector. The heuristic firings indicate this PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. While no scripts were extracted, the structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful content.

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
  • 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://yafferge.ru/aws?utm_term=cuisine+royale++free+pc In PDF document text
    • http://just-gopro.com/migujinejozaazr.pdfIn PDF document text
    • http://maddot.space/15089250401ah1vb.pdfIn PDF document text
    • https://zifimegepero.weebly.com/uploads/1/3/4/6/134601706/fufewenitu.pdfIn PDF document text
    • https://zimemomikinipex.weebly.com/uploads/1/3/5/3/135347479/4258802.pdfIn PDF document text
    • https://notilapixoto.weebly.com/uploads/1/3/4/3/134397855/godon-mabokigo.pdfIn PDF document text
    • http://nyvelsets.online/estadistica_para_ingenieros_miller_plpt2t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378845/normal_5ff2630de1e78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368997/normal_5ff92761e424d.pdfIn PDF document text
    • https://dowogejur.weebly.com/uploads/1/3/5/9/135992185/1533376.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/web_browser_android_studiogrj5z.pdfIn PDF document text
    • https://kibajalixil.weebly.com/uploads/1/3/0/7/130739780/fomeravupuwowafoteda.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/xoguwavosuje/free_astrosage_kundli_software_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/gajarivijegum.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/munuteninu.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/android_material_design_bottom_navigation_example.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/26200933152.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/deled_2018_marksheet_semester_2.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/blackshot_m_gears_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/22181444127.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/92830488075.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/68527263249.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/pesedogojadirabaligu.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_off0000e12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12F 5016 bytes
SHA-256: 86bafb429a79bdfd1671d4b169c7f029bf4602c300e1896c5eea01dc3057f0a7
font_01_sfnt_off0000f256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF256 12580 bytes
SHA-256: 2590f9621640c4c548472e10550185474963e125f7197e887b13cb6fca13ee9c

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