Malicious PDF — malware analysis report

Static analysis result for SHA-256 0147dc2af8ffc4b1…

MALICIOUS

PDF

85.6 KB Created: 2021-03-01 01:33:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 4b45ca012d50e2ee5687c3837053163d SHA-1: ed5635f6c71749402ff159022de890a4617e67cc SHA-256: 0147dc2af8ffc4b1f54332812825f5c85cc39ebea3ec230e48148f2ddf8522d0
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a PDF document that contains numerous embedded links, many of which point to known malicious redirector infrastructure or link farms. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to "crime patrol" and a date, suggesting a lure to entice users to click the malicious links.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=crime+patrol+12th+june+2015+answers In PDF document text
    • https://nafeziwubiwodi.weebly.com/uploads/1/3/1/3/131379183/2472047e3809.pdfIn PDF document text
    • http://kexipisibufexur.22web.org/clifton_court_forebay_fishing_report.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/bryant_plus_90_secondary_heat_exchanger.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_601f1026dce89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381302/normal_5fff304f20bfc.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/liwalamakegirid.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/excelsior_definition_greek.pdfIn PDF document text
    • http://nuvagefo.medianewsonline.com/tipesudi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475016/normal_60148f143959f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://zuwarikufaz.epizy.com/football_manager_2019_patch_19._3._6.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/berklee_performance_center_streaming.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/best_wireless_earbuds_for_running_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/72463074666.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/60263341220.pdfIn PDF document text
    • http://zimifad.epizy.com/portable_phones_without_answering_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/corporation_tax_return_form_2008.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE974 5584 bytes
SHA-256: 9d2a22e856ae44c15ffdd4f1931fa49b6f8861f89f620fe2f4ed38412f4cc8f1
font_01_sfnt_off0000fc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC53 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off000107b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B5 10524 bytes
SHA-256: d909ab9cb990880e21b905ef091062e48bb3bef24ab1516b0a78b6e945eca1d3
font_03_sfnt_off00012c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C16 8760 bytes
SHA-256: 3cd29a23a5e00855239f6aaeac28255ef1230ca351cc84df03e3d9be74246b71

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